SQL Expression Question

To the forum members
In the Crystal Formula Editor, under Print State, there is a function called Previous. This compares the contents of the current field to the previous one. Is there a similar function in the SQL Expression Editor. I'm trying to use a Case When statement to compare the current value in two fields to their previous value. If these values do not match I need the SQL Expression to add 20 fields together and display the total.
Thanks in advance.
B.

good sql forum
http://www.sqlteam.com/forums/forum.asp

Similar Messages

NOT ABLE TO SEE SQL EXPRESSION FIELDS IN CR2008

Hi,
I am not able to see the SQL EXPRESSION FIELDS in the FIELD EXPLORER of CR 2008.Can
you please help me
BABASHARI

Hi,
I would suggest you open the question in the Crystal Reports forum.
Ingo

First time an SQL expression is placed on report a DB SELECT executes

The same problem can be created using the normal Crystal Reports XI Release 2 developer environment and/or code (not only a code issue). I'm using CR XI.
Symptom:
We dynamically auto generate SQL Expressions, Tables, Joins, Formula's and anything through C# and place it onto the Crystal Report through code via run-time user input in a web environment. I recieved a notification from one of my DB admins that crystal reports is causing massive memory consumption via unknown SELECT statements that have no joins and/or WHERE criteria.
Some Detective Work/More Info:
After using Microsoft "SQL Profiler" along with Crystal, I understand what is happening but don't know the "work around" to make Crystal stop executing the following SELECT scenario.
Anytime I create a new "SQL Expression" for the first time and then physically "drag and drop" it onto the report then Crystal is executing a "silent" SELECT statement against the database in the design environment. I'm calling it "silent" because I need MS SQL Profiler to see it happen. I'm guessing that this is used for validation or something but this is causing problems when automatically generating a report in a production environment.
Steps to re-create:
1. Open MS "SQL Profiler" and get it running. (will show Crystal Engine silently executes the SELECTS)
2. Add a new "SQL Expression" to your report.
3. Drag and Drop your new "SQL Expression onto your report
4. You will see that Crystal has created an SQL query and executed it against your database in design environment.
The Problem:
I can see under normal circumstances why you might want this funtionality (if it's actually used for the Crystal Engine to validate your SQL Expression). But, What also makes this functionality horrible is that on my behalf Crystal is creating these SELECT statements and using cross joins which is a major problem in a production environment. As a result, huge record sets are being created on our DB Server. I don't believe that this has any purpose in a production evironment when the cross-joins can create huge amounts of results just for the sake of Crystal Internally validating a new SQL Expression placed onto a report. It would be nice to disable this functionality in production. I don't know a "work around" since these SELECT queries are created on my behalf by the Crystal Engine at design time (via code auto generation in production).
Questions:
Can this functionality be disabled to prevent a production server from incurring the execution of these queries?
Anybody else notice this and have a "work around"?

This is a cross post of:
1st time an SQL expression is placed on report a DB SELECT executes
Please do not cross post. See the [Rules of Engagement|https://www.sdn.sap.com/irj/sdn/wiki?path=/display/home/rulesofEngagement].
The above post has been moved to the Crystal Reports Design forum, thus locking this thread.
Ludek

1st time an SQL expression is placed on report a DB SELECT executes

The same problem can be created using the normal Crystal Reports XI Release 2 developer environment and/or code (not only a code issue).
Symptom:
We dynamically auto generate SQL Expressions, Tables, Joins, Formula's and anything through C# and place it onto the Crystal Report through code via run-time user input in a web environment. I recieved a notification from one of my DB admins that crystal reports is causing massive memory consumption via unknown SELECT statements that have no joins and/or WHERE criteria.
Some Detective Work/More Info:
After using Microsoft "SQL Profiler" along with Crystal, I understand what is happening but don't know the "work around" to make Crystal stop executing the following SELECT scenario.
Anytime I create a new "SQL Expression" for the first time and then physically "drag and drop" it onto the report then Crystal is executing a "silent" SELECT statement against the database in the design environment. I'm calling it "silent" because I need MS SQL Profiler to see it happen. I'm guessing that this is used for validation or something but this is causing problems when automatically generating a report in a production environment.
Steps to re-create:
1. Open MS "SQL Profiler" and get it running. (will show Crystal Engine silently executes the SELECTS)
2. Add a new "SQL Expression" to your report.
3. Drag and Drop your new "SQL Expression onto your report
4. You will see that Crystal has created an SQL query and executed it against your database in design environment.
The Problem:
I can see under normal circumstances why you might want this funtionality (if it's actually used for the Crystal Engine to validate your SQL Expression). But, What also makes this functionality horrible is that on my behalf Crystal is creating these SELECT statements and using cross joins which is a major problem in a production environment. As a result, huge record sets are being created on our DB Server. I don't believe that this has any purpose in a production evironment when the cross-joins can create huge amounts of results just for the sake of Crystal Internally validating a new SQL Expression placed onto a report. It would be nice to disable this functionality in production. I don't know a "work around" since these SELECT queries are created on my behalf by the Crystal Engine at design time (via code auto generation in production).
Questions:
Can this functionality be disabled to prevent a production server from incurring the execution of these queries?
Anybody else notice this and have a "work around"?

Note that this is a "Lagacy Application Development SDKs" forum and as such it is dedicated to topics related to legacy SDKs, including the Report Designer Component (RDC), OCX, VCL, and Crystal Reports Print Engine (CRPE).
As your issue concerns the Crystal Report Designer (crw32.exe), transferring to the Crystal Reports Design forum:
SAP Crystal Reports
Ludek

First time an SQL expression is placed on report a DB SELECT executes -CRXI

The same problem can be created using the normal Crystal Reports XI Release 2 developer environment and/or code (not only a code issue).
Symptom:
We dynamically auto generate SQL Expressions, Tables, Joins, Formula's and anything through C# and place it onto the Crystal Report through code via run-time user input in a web environment. I recieved a notification from one of my DB admins that crystal reports is causing massive memory consumption via unknown SELECT statements that have no joins and/or WHERE criteria.
Some Detective Work/More Info:
After using Microsoft "SQL Profiler" along with Crystal, I understand what is happening but don't know the "work around" to make Crystal stop executing the following SELECT scenario.
Anytime I create a new "SQL Expression" for the first time and then physically "drag and drop" it onto the report then Crystal is executing a "silent" SELECT statement against the database in the design environment. I'm calling it "silent" because I need MS SQL Profiler to see it happen. I'm guessing that this is used for validation or something but this is causing problems when automatically generating a report in a production environment.
Steps to re-create:
1. Open MS "SQL Profiler" and get it running. (will show Crystal Engine silently executes the SELECTS)
2. Add a new "SQL Expression" to your report.
3. Drag and Drop your new "SQL Expression onto your report
4. You will see that Crystal has created an SQL query and executed it against your database in design environment.
The Problem:
I can see under normal circumstances why you might want this funtionality (if it's actually used for the Crystal Engine to validate your SQL Expression). But, What also makes this functionality horrible is that on my behalf Crystal is creating these SELECT statements and using cross joins which is a major problem in a production environment. As a result, huge record sets are being created on our DB Server. I don't believe that this has any purpose in a production evironment when the cross-joins can create huge amounts of results just for the sake of Crystal Internally validating a new SQL Expression placed onto a report. It would be nice to disable this functionality in production. I don't know a "work around" since these SELECT queries are created on my behalf by the Crystal Engine at design time (via code auto generation in production).
Questions:
Can this functionality be disabled to prevent a production server from incurring the execution of these queries?
Anybody else notice this and have a "work around"?

duplicate - please do not post multiple times

SQL Browser not started in SQL Express 2012

I just installed SQL Express 2012 on a Windows Server 2008. I downloaded the advanced 64bit installation file and selected all the options except SSRS. Everything seemed to install successfully including SSMS. I was able to connect to the instance locally
and create a database. However, when I tries to connect from a client PC, I got the "not configured for remote connections" error. I went into Configuration Manager on the server and saw that that SQL Browser was stopped. But the Start Service option
was grayed out. How can I enable SQL Browser?
Darrell H Burns

Hi, be sure that service is enabled by
hope it will help you,
Questo post è fornito "così com'è". Non conferisce garanzie o diritti di alcun tipo. Ricorda di usare la funzione "segna come risposta" per i post che ti hanno aiutato a risolvere il problema e "deseleziona
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Helpful if it helps to solve your issue. This can be beneficial to other community members reading the thread.

Displaying diff dates using PL/SQL expression for 'display only' item ?

Hi ,
I am having a display only item -- :P2_FROM_Date . If its Thu,Fri,Sat or Sun I want to set the date as the last Monday's date . If its Mon,Tue or Wed then it should be the present Monday's date .
E.g: Today is Friday and the last Monday was on 18th .
So for yesterday , today,tomorrow and Sunday , the date should be displayed as 18-JUN-2012.
From the coming Monday to Wednesday , the date should of be the coming Monday i.e , 24-JUN-2012
I tried it doing under 'Source ' of item using PL/SQL expression and PL/SQL function body. Not working
Can someone help ?
Thanks & Regards
Umer

Nice1 wrote:
declare
lv_date number;
begin
select to_char(sysdate,'D') into lv_date from dual;
if lv_date=2 then
:P2_FROM_DATE := to_char(sysdate-1);
end if;
end;I tried this under " PL/SQL function body " in "Source " tab of the item P2_FROM_DATE
When I run this , nothing is displayed corresponding to the item P2_FROM_DATEExactly as expected. This code will only set a value for <tt>P2_FROM_DATE</tt> when run on Mondays in territories where the first day of the week is Sunday, and when run on Tuesdays where Monday is the first day of of the week:
SQL> var P2_FROM_DATE varchar2(30)
SQL> alter session set nls_date_format='Dy DD-MON-YYYY';
Session altered.
SQL> select sysdate from dual
SYSDATE
Mon 25-JUN-2012
SQL> alter session set nls_territory='AMERICA';
Session altered.
SQL> declare
2 lv_date number;
3 begin
4 select to_char(sysdate,'D') into lv_date from dual;
5 if lv_date=2 then
6 :P2_FROM_DATE := to_char(sysdate-1);
7 end if;
8 end;
9 /
PL/SQL procedure successfully completed.
SQL> print p2_from_date
P2_FROM_DATE
Sun 24-JUN-2012
SQL> alter session set nls_territory='UNITED KINGDOM';
Session altered.
SQL> exec :p2_from_date := null
SQL> declare
2 lv_date number;
3 begin
4 select to_char(sysdate,'D') into lv_date from dual;
5 if lv_date=2 then
6 :P2_FROM_DATE := to_char(sysdate-1);
7 end if;
8 end;
9 /
PL/SQL procedure successfully completed.
SQL> print p2_from_date
P2_FROM_DATE
SQL>Hence the questions about language above.
>
I am having a display only item -- :P2_FROM_Date . If its Thu,Fri,Sat or Sun I want to set the date as the last Monday's date . If its Mon,Tue or Wed then it should be the present Monday's date .
E.g: Today is Friday and the last Monday was on 18th .
So for yesterday , today,tomorrow and Sunday , the date should be displayed as 18-JUN-2012.
From the coming Monday to Wednesday , the date should of be the coming Monday i.e , 24-JUN-2012
>
The coming Monday is 25-JUN-2012.
Aren't these rules equivalent to "Monday this week, where Monday is the first day of the week"? In which case the PL/SQL Expression you require is:
trunc(sysdate, 'iw')For example:
SQL> with t as (
2    select date '2012-06-21' + level d from dual connect by level <= 17)
3 select
4            d
5          , trunc(d, 'iw') monday
6 from
7            t;
D               MONDAY
Fri 22-JUN-2012 Mon 18-JUN-2012
Sat 23-JUN-2012 Mon 18-JUN-2012
Sun 24-JUN-2012 Mon 18-JUN-2012
Mon 25-JUN-2012 Mon 25-JUN-2012
Tue 26-JUN-2012 Mon 25-JUN-2012
Wed 27-JUN-2012 Mon 25-JUN-2012
Thu 28-JUN-2012 Mon 25-JUN-2012
Fri 29-JUN-2012 Mon 25-JUN-2012
Sat 30-JUN-2012 Mon 25-JUN-2012
Sun 01-JUL-2012 Mon 25-JUN-2012
Mon 02-JUL-2012 Mon 02-JUL-2012
Tue 03-JUL-2012 Mon 02-JUL-2012
Wed 04-JUL-2012 Mon 02-JUL-2012
Thu 05-JUL-2012 Mon 02-JUL-2012
Fri 06-JUL-2012 Mon 02-JUL-2012
Sat 07-JUL-2012 Mon 02-JUL-2012
Sun 08-JUL-2012 Mon 02-JUL-2012
17 rows selected.
SQL> alter session set nls_territory='AMERICA';
Session altered.
SQL> alter session set nls_date_format='Dy DD-MON-YYYY';
Session altered.
SQL> with t as (
2    select date '2012-06-21' + level d from dual connect by level <= 17)
3 select
4            d
5          , trunc(d, 'iw') monday
6 from
7            t;
D               MONDAY
Fri 22-JUN-2012 Mon 18-JUN-2012
Sat 23-JUN-2012 Mon 18-JUN-2012
Sun 24-JUN-2012 Mon 18-JUN-2012
Mon 25-JUN-2012 Mon 25-JUN-2012
Tue 26-JUN-2012 Mon 25-JUN-2012
Wed 27-JUN-2012 Mon 25-JUN-2012
Thu 28-JUN-2012 Mon 25-JUN-2012
Fri 29-JUN-2012 Mon 25-JUN-2012
Sat 30-JUN-2012 Mon 25-JUN-2012
Sun 01-JUL-2012 Mon 25-JUN-2012
Mon 02-JUL-2012 Mon 02-JUL-2012
Tue 03-JUL-2012 Mon 02-JUL-2012
Wed 04-JUL-2012 Mon 02-JUL-2012
Thu 05-JUL-2012 Mon 02-JUL-2012
Fri 06-JUL-2012 Mon 02-JUL-2012
Sat 07-JUL-2012 Mon 02-JUL-2012
Sun 08-JUL-2012 Mon 02-JUL-2012
17 rows selected.Also note that using the item source properties will only set the <tt>P2_FROM_DATE</tt> in the rendered page, not in session state.

Help on SQL expressions in IDT

Hello experts,
I have relational connection type universe connected to SAP BW multiprovider.
I have 2 questions...
1. I want to be able to derive the cumulative total by fiscal year period. In WebI, the function is runningsum. What expression can I use in IDT business layer to calculate runningsum.
Example..
2. In WebI, there is a function sum[amount] ForAll ([Fiscal Yr Period]). How can I acheive the same function in IDT's business layer SQL expression?
Example..desired result is below highlighted in yellow colum
Appreciate any help or guidance.
Just to clarify, I need to keep the calculations in the universe and not in WebI report.
Thanks
Ann

Ann,
To be perfectly honest, I would advise against it unless you have a really specific requirement which you cannot do in Webi. Cumulatives like running sum are better achieved in Webi because it offers more flexibility. You build a universe to provide the flexibility of adhoc analysis - try and visualise in SQL terms what you want to do and then consider that this can be mixed and matched with other dimensions and it throws the granularity.
What benefits do you perceive from doing it at the IDT level? Is it simply because the end users are struggling with the context operators?

SQL Express LocalDB as Back-end for MS Access

Can a MS Access front-end database be connected to the new SQL Express LocalDB backend on the same machine?
If the answer is YES, where do I find information about the driver/connection string?
This is what I’m trying to accomplish. I have a project that uses MS Access to collect data using stationary PCs located far from the actual data collection site. The use of Tablet PCs with the use of wireless network has been suggested to make data entry
more efficient so data collection is done at the point of inspection. The problem is that MS Access was not build to transmit data/be used in a wireless network environment, so my idea was to use the same MS Access front end (to save time by not building anther
FE and keep same interface for user) with a LocalDB as back end on the Tablet PC and have the LocalDB either at time interval send the data to synch to a network replica backend for everybody use.
If answer is NO, suggest a feasible approach with any other product of way to accomplish this data transmission.
Just so this post question is clearer a SQL Server is not be permitted in this site.
Thanks
IB_4

Hi,
These threads may be helpful:
Using SQL Server LocalDB and Access across servers and platforms
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/5fed23bd-5f2f-4dfa-a7d2-66ce5874f333/using-sql-server-localdb-and-access-across-servers-and-platforms
Link Access 2013 To SQL Server LocalDB Tables
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/a05b7650-3ab5-4b3e-beb1-2094336c589c/link-access-2013-to-sql-server-localdb-tables
Meanwhile, your question is related to Access database. I would suggest you initial a new thread in Access forum for dedicated support.
http://social.msdn.microsoft.com/Forums/office/en-US/home?forum=accessdev
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
Tracy Cai
TechNet Community Support

Error using Filter with SQL Expression

Hey all -
New to Oracle BI, and getting a problem with Filters that use SQL Expressions.
The column I'm filtering on is a 4 digit year, expressed as a VARCHAR2(4 byte) in the physical database. My SQL Expression in the filter is:
Column: CAL YEAR 4 DIGIT
Operator: Is equal to/in
SQL Expression: TO_CHAR(ADD_MONTHS(SYSDATE, -24), 'YYYY'))
when I click on the "Results" Tab I get the following error message:
Error Codes: YQCO4T56:OPR4ONWY:U9IM8TAC:OI2DL65P
Odbc driver returned an error (SQLExecDirectW).
State: HY000. Code: 10058. [NQODBC] [SQL_STATE: HY000] [nQSError: 10058] A general error has occurred. [nQSError: 27002] Near <(>: Syntax error [nQSError: 26012] . (HY000)
I've isolated the issue to the expression above. If I put in a literal value and supply a four digit year like below it works:
Column: CAL YEAR 4 DIGIT
Operator: Is equal to/in
SQL Expression: *2008*
Any ideas on what's causing my problem?
Thanks!
Mac

macearl wrote:
SQL View does not display unless data is returned by the query. Is that normal?
Also, none of these options shows the literal result of the expression we built, i.e.:
expression: CAST(YEAR(TIMESTAMPADD(SQL_TSI_MONTH, -24, CURRENT_DATE)) as CHAR)
result: *2008*
Having the ability to test expressions and see their results would be very helpful in debugging. If anyone knows how to do that please share!
Thanks!
MacOk, Probably shoud have figured this out before, but in response to my own question, the way to view the result of an expression is to add the expression as a column and include it in the Table Presentation.
- Mac (he can be taught)

Oracle SQL and PL/SQL interview questions.

Can anyone forward me all Oracle SQL and PL/SQL Interview questions and answers asap.
Many Thanks.
Bba

Dear Pal
I not sure all the all answers are correct. I got one mail couple yrs back. I am just sharing mail contents. Kindly keep question and compare answers.
1 Which is more faster - IN or EXISTS?
EXISTS is more faster than IN because EXISTS returns a Boolean value whereas IN returns a value.
2 Which datatype is used for storing graphics and images?
LONG RAW data type is used for storing BLOB's (binary large objects).
3 When do you use WHERE clause and when do you use HAVING clause?
HAVING clause is used when you want to specify a condition for a group function and it is written after GROUP BY clause. The WHERE clause is used when you want to specify a condition for columns, single row functions except group functions and it is written before GROUP BY clause if it is used.
4 What WHERE CURRENT OF clause does in a cursor?
LOOPSELECT num_credits INTO v_numcredits FROM classesWHERE dept=123 and course=101;UPDATE studentsSET current_credits=current_credits+v_numcreditsWHERE CURRENT OF X;END LOOPCOMMIT;END;
5 What should be the return type for a cursor variable.Can we use a scalar data type as return type?
The return type for a cursor must be a record type.It can be declared explicitly as a user-defined or %ROWTYPE can be used. eg TYPE t_studentsref IS REF CURSOR RETURN students%ROWTYPE
6 What is use of a cursor variable? How it is defined?
A cursor variable is associated with different statements at run time, which can hold different values at run time. Static cursors can only be associated with one run time query. A cursor variable is reference type (like a pointer in C).Declaring a cursor variable:TYPE type_name IS REF CURSOR RETURN return_type type_name is the name of the reference type,return_type is a record type indicating the types of the select list that will eventually be returned by the cursor variable.
7 What is the purpose of a cluster?
Oracle does not allow a user to specifically locate tables, since that is a part of the function of the RDBMS. However, for the purpose of increasing performance, oracle allows a developer to create a CLUSTER. A CLUSTER provides a means for storing data from different tables together for faster retrieval than if the table placement were left to the RDBMS.
8 What is the maximum buffer size that can be specified using the DBMS_OUTPUT.ENABLE function?
1,000,00
9 What is syntax for dropping a procedure and a function .Are these operations possible?
Drop Procedure procedure_nameDrop Function function_name
10 What is OCI. What are its uses?
Oracle Call Interface is a method of accesing database from a 3GL program. Uses--No precompiler is required,PL/SQL blocks are executed like other DML statements. The OCI library provides· -functions to parse SQL statemets· -bind input variables· -bind output variables· -execute statements· -fetch the results
11 What is difference between UNIQUE and PRIMARY KEY constraints?
A table can have only one PRIMARY KEY whereas there can be any number of UNIQUE keys. The columns that compose PK are automatically define NOT NULL, whereas a column that compose a UNIQUE is not automatically defined to be mandatory must also specify the column is NOT NULL.
12 What is difference between SUBSTR and INSTR?
SUBSTR returns a specified portion of a string eg SUBSTR('BCDEF',4) output BCDEINSTR provides character position in which a pattern is found in a string. eg INSTR('ABC-DC-F','-',2) output 7 (2nd occurence of '-')
13 What is difference between SQL and SQL*PLUS?
SQL*PLUS is a command line tool where as SQL and PL/SQL language interface and reporting tool. Its a command line tool that allows user to type SQL commands to be executed directly against an Oracle database. SQL is a language used to query the relational database(DML,DCL,DDL). SQL*PLUS commands are used to format query result, Set options, Edit SQL commands and PL/SQL.
14 What is difference between Rename and Alias?
Rename is a permanent name given to a table or column whereas Alias is a temporary name given to a table or column which do not exist once the SQL statement is executed.
15 What is difference between a formal and an actual parameter?
The variables declared in the procedure and which are passed, as arguments are called actual, the parameters in the procedure declaration. Actual parameters contain the values that are passed to a procedure and receive results. Formal parameters are the placeholders for the values of actual parameters
16 What is an UTL_FILE.What are different procedures and functions associated with it?
UTL_FILE is a package that adds the ability to read and write to operating system files. Procedures associated with it are FCLOSE, FCLOSE_ALL and 5 procedures to output data to a file PUT, PUT_LINE, NEW_LINE, PUTF, FFLUSH.PUT, FFLUSH.PUT_LINE,FFLUSH.NEW_LINE. Functions associated with it are FOPEN, ISOPEN.
17 What is a view ?
A view is stored procedure based on one or more tables, its a virtual table.
18 What is a pseudo column. Give some examples?
It is a column that is not an actual column in the table.eg USER, UID, SYSDATE, ROWNUM, ROWID, NULL, AND LEVEL.
19 What is a OUTER JOIN?
Outer Join--Its a join condition used where you can query all the rows of one of the tables in the join condition even though they dont satisfy the join condition.
20 What is a cursor?
Oracle uses work area to execute SQL statements and store processing information PL/SQL construct called a cursor lets you name a work area and access its stored information A cursor is a mechanism used to fetch more than one row in a Pl/SQl block.
21 What is a cursor for loop?
Cursor For Loop is a loop where oracle implicitly declares a loop variable, the loop index that of the same record type as the cursor's record.
22 What are various privileges that a user can grant to another user?
· SELECT· CONNECT· RESOURCES
23 What are various constraints used in SQL?
· NULL· NOT NULL· CHECK· DEFAULT
24 What are ORACLE PRECOMPILERS?
Using ORACLE PRECOMPILERS, SQL statements and PL/SQL blocks can be contained inside 3GL programs written in C,C++,COBOL,PASCAL, FORTRAN,PL/1 AND ADA.The Precompilers are known as Pro*C,Pro*Cobol,...This form of PL/SQL is known as embedded pl/sql,the language in which pl/sql is embedded is known as the host language. The prcompiler translates the embedded SQL and pl/sql ststements into calls to the precompiler runtime library.The output must be compiled and linked with this library to creater an executable.
25 What are different Oracle database objects?
· TABLES· VIEWS· INDEXES· SYNONYMS· SEQUENCES· TABLESPACES etc
26 What are different modes of parameters used in functions and procedures?
· IN· OUT· INOUT
27 What are cursor attributes?
· %ROWCOUNT· %NOTFOUND· %FOUND· %ISOPEN
28 What a SELECT FOR UPDATE cursor represent. [ANSWER]SELECT......FROM......FOR......UPDATE[OF column-reference][NOWAIT] The processing done in a fetch loop modifies the rows that have been retrieved by the cursor. A convenient way of modifying the rows is done by a method with two parts: the FOR UPDATE clause in the cursor declaration, WHERE CURRENT OF CLAUSE in an UPDATE or declaration statement.
29 There is a string 120000 12 0 .125 , how you will find the position of the decimal place?
INSTR('120000 12 0 .125',1,'.')output 13
30 There is a % sign in one field of a column. What will be the query to find it?
'' Should be used before '%'.
31 Suppose a customer table is having different columns like customer no, payments.What will be the query to select top three max payments?
SELECT customer_no, payments from customer C1
WHERE 3<=(SELECT COUNT(*) from customer C2
WHERE C1.payment <= C2.payment)
32 minvalue.sql Select the Nth lowest value from a table
select level, min('col_name') from my_table where level = '&n' connect by prior ('col_name') <
'col_name')
group by level;
Example:
Given a table called emp with the following columns:
-- id number
-- name varchar2(20)
-- sal number
-- For the second lowest salary:
-- select level, min(sal) from emp
-- where level=2
-- connect by prior sal < sal
-- group by level
33 maxvalue.sql Select the Nth Highest value from a table
select level, max('col_name') from my_table where level = '&n' connect by prior ('col_name') >
'col_name')
group by level;
Example:
Given a table called emp with the following columns:
-- id number
-- name varchar2(20)
-- sal number
-- For the second highest salary:
-- select level, max(sal) from emp
-- where level=2
-- connect by prior sal > sal
-- group by level
34 How you will avoid your query from using indexes?
SELECT * FROM emp
Where emp_no+' '=12345;
i.e you have to concatenate the column name with space within codes in the where condition.
SELECT /*+ FULL(a) */ ename, emp_no from emp
where emp_no=1234;
i.e using HINTS
35 How you will avoid duplicating records in a query?
By using DISTINCT
36 How you were passing cursor variables in PL/SQL 2.2?
In PL/SQL 2.2 cursor variables cannot be declared in a package.This is because the storage for a cursor variable has to be allocated using Pro*C or OCI with version 2.2, the only means of passing a cursor variable to a PL/SQL block is via bind variable or a procedure parameter.
37 How you open and close a cursor variable.Why it is required?
OPEN cursor variable FOR SELECT...Statement
CLOSE cursor variable In order to associate a cursor variable with a particular SELECT statement OPEN syntax is used. In order to free the resources used for the query CLOSE statement is used.
38 How will you delete duplicating rows from a base table?
delete from table_name where rowid not in (select max(rowid) from table group by duplicate_values_field_name); or
delete duplicate_values_field_name dv from table_name ta where rowid <(select min(rowid) from table_name tb where ta.dv=tb.dv);
39 How do you find the numbert of rows in a Table ?
A bad answer is count them (SELECT COUNT(*) FROM table_name)
A good answer is :-
'By generating SQL to ANALYZE TABLE table_name COUNT STATISTICS by querying Oracle System Catalogues (e.g. USER_TABLES or ALL_TABLES).
The best answer is to refer to the utility which Oracle released which makes it unnecessary to do ANALYZE TABLE for each Table individually.
40 Find out nth highest salary from emp table
SELECT DISTINCT (a.sal) FROM EMP A WHERE &N = (SELECT COUNT (DISTINCT (b.sal)) FROM EMP B WHERE a.sal<=b.sal);
For Eg:-
Enter value for n: 2
SAL
3700
41 Display the records between two range?
select rownum, empno, ename from emp where rowid in (select rowid from emp where rownum <=&upto minus select rowid from emp where rownum<&Start);
42 Display the number value in Words?
SQL> select sal, (to_char(to_date(sal,'j'), 'jsp'))
from emp;
the output like,
SAL (TO_CHAR(TO_DATE(SAL,'J'),'JSP'))
800 eight hundred
1600 one thousand six hundred
1250 one thousand two hundred fifty
If you want to add some text like, Rs. Three Thousand only.
SQL> select sal "Salary ",
(' Rs. '|| (to_char(to_date(sal,'j'), 'Jsp'))|| ' only.'))
"Sal in Words" from emp
Salary Sal in Words
800 Rs. Eight Hundred only.
1600 Rs. One Thousand Six Hundred only.
1250 Rs. One Thousand Two Hundred Fifty only.
43 Display Odd/ Even number of records
Odd number of records:
select * from emp where (rowid,1) in (select rowid, mod(rownum,2) from emp);
Output:-
1
3
5
Even number of records:
select * from emp where (rowid,0) in (select rowid, mod(rownum,2) from emp)
Output:-
2
4
6
44 Difference between procedure and function.
Functions are named PL/SQL blocks that return a value and can be called with arguments procedure a named block that can be called with parameter. A procedure all is a PL/SQL statement by itself, while a Function call is called as part of an expression.
45 Difference between NO DATA FOUND and %NOTFOUND
NO DATA FOUND is an exception raised only for the SELECT....INTO statements when the where clause of the querydoes not match any rows. When the where clause of the explicit cursor does not match any rows the %NOTFOUND attribute is set to TRUE instead.
46 Difference between database triggers and form triggers?
Data base trigger(DBT) fires when a DML operation is performed on a data base table. Form trigger(FT) Fires when user presses a key or navigates between fields on the screen
Can be row level or statement level No distinction between row level and statement level.
Can manipulate data stored in Oracle tables via SQL Can manipulate data in Oracle tables as well as variables in forms.
Can be fired from any session executing the triggering DML statements. Can be fired only from the form that define the trigger.
Can cause other database triggers to fire.Can cause other database triggers to fire, but not other form triggers.
47 Difference between an implicit & an explicit cursor.
PL/SQL declares a cursor implicitly for all SQL data manipulation statements, including quries that return only one row. However,queries that return more than one row you must declare an explicit cursor or use a cursor FOR loop.
Explicit cursor is a cursor in which the cursor name is explicitly assigned to a SELECT statement via the CURSOR...IS statement. An implicit cursor is used for all SQL statements Declare, Open, Fetch, Close. An explicit cursors are used to process multirow SELECT statements An implicit cursor is used to process INSERT, UPDATE, DELETE and single row SELECT. .INTO statements.
48 Can you use a commit statement within a database trigger?
No.
49 Can the default values be assigned to actual parameters?
Yes
50 Can cursor variables be stored in PL/SQL tables.If yes how. If not why?
No, a cursor variable points a row which cannot be stored in a two-dimensional PL/SQL table.
51 Can a primary key contain more than one columns?
Yes
52 Can a function take OUT parameters. If not why?
No. A function has to return a value,an OUT parameter cannot return a value.
53 What are various joins used while writing SUBQUERIES?
Self join-Its a join foreign key of a table references the same table. Outer Join--Its a join condition used where One can query all the rows of one of the tables in the join condition even though they don't satisfy the join condition.
Equi-join--Its a join condition that retrieves rows from one or more tables in which one or more columns in one table are equal to one or more columns in the second table.
54 Differentiate between TRUNCATE and DELETE
TRUNCATE deletes much faster than DELETE
TRUNCATE
DELETE
It is a DDL statement It is a DML statement
It is a one way trip,cannot ROLLBACK One can Rollback
Doesn't have selective features (where clause) Has
Doesn't fire database triggers Does
It requires disabling of referential constraints. Does not require
1 What is PL/SQL ?
PL/SQL is a procedural language that has both interactive SQL and procedural programming language constructs such as iteration, conditional branching.
2 Write the order of precedence for validation of a column in a table ?
I. done using Database triggers.
ii. done using Integarity Constraints.
I & ii.
Exception :
3 Where the Pre_defined_exceptions are stored ?
In the standard package.
Procedures, Functions & Packages ;
4 What are % TYPE and % ROWTYPE ? What are the advantages of using these over datatypes?
% TYPE provides the data type of a variable or a database column to that variable.
% ROWTYPE provides the record type that represents a entire row of a table or view or columns selected in the cursor.
The advantages are : I. Need not know about variable's data type
ii. If the database definition of a column in a table changes, the data type of a variable changes accordingly.
5 What will happen after commit statement ?
Cursor C1 is
Select empno,
ename from emp;
Begin
open C1; loop
Fetch C1 into
eno.ename;
Exit When
C1 %notfound;-----
commit;
end loop;
end;
The cursor having query as SELECT .... FOR UPDATE gets closed after COMMIT/ROLLBACK.
The cursor having query as SELECT.... does not get closed even after COMMIT/ROLLBACK.
6 What is the basic structure of PL/SQL ?
PL/SQL uses block structure as its basic structure. Anonymous blocks or nested blocks can be used in PL/SQL.
7 What is Raise_application_error ?
Raise_application_error is a procedure of package DBMS_STANDARD which allows to issue an user_defined error messages from stored sub-program or database trigger.
8 What is Pragma EXECPTION_INIT ? Explain the usage ?
The PRAGMA EXECPTION_INIT tells the complier to associate an exception with an oracle error. To get an error message of a specific oracle error.
e.g. PRAGMA EXCEPTION_INIT (exception name, oracle error number)
9 What is PL/SQL table ?
Objects of type TABLE are called "PL/SQL tables", which are modeled as (but not the same as) database tables, PL/SQL tables use a primary PL/SQL tables can have one column and a primary key.
Cursors
10 What is Overloading of procedures ?
The Same procedure name is repeated with parameters of different datatypes and parameters in different positions, varying number of parameters is called overloading of procedures.
e.g. DBMS_OUTPUT put_line
What is a package ? What are the advantages of packages ?
11 What is difference between a PROCEDURE & FUNCTION ?
A FUNCTION is always returns a value using the return statement.
A PROCEDURE may return one or more values through parameters or may not return at all.
12 What is difference between a Cursor declared in a procedure and Cursor declared in a package specification ?
A cursor declared in a package specification is global and can be accessed by other procedures or procedures in a package.
A cursor declared in a procedure is local to the procedure that can not be accessed by other procedures.
13 What is difference between % ROWTYPE and TYPE RECORD ?
% ROWTYPE is to be used whenever query returns a entire row of a table or view.
TYPE rec RECORD is to be used whenever query returns columns of different
table or views and variables.
E.g. TYPE r_emp is RECORD (eno emp.empno% type,ename emp ename %type
e_rec emp% ROWTYPE
cursor c1 is select empno,deptno from emp;
e_rec c1 %ROWTYPE.
14 What is an Exception ? What are types of Exception ?
Exception is the error handling part of PL/SQL block. The types are Predefined and user defined. Some of Predefined exceptions are.
CURSOR_ALREADY_OPEN
DUP_VAL_ON_INDEX
NO_DATA_FOUND
TOO_MANY_ROWS
INVALID_CURSOR
INVALID_NUMBER
LOGON_DENIED
NOT_LOGGED_ON
PROGRAM-ERROR
STORAGE_ERROR
TIMEOUT_ON_RESOURCE
VALUE_ERROR
ZERO_DIVIDE
OTHERS.
15 What is a stored procedure ?
A stored procedure is a sequence of statements that perform specific function.
16 What is a database trigger ? Name some usages of database trigger ?
Database trigger is stored PL/SQL program unit associated with a specific database table. Usages are Audit data modifications, Log events transparently, Enforce complex business rules Derive column values automatically, Implement complex security authorizations. Maintain replicate tables.
17 What is a cursor for loop ?
Cursor for loop implicitly declares %ROWTYPE as loop index,opens a cursor, fetches rows of values from active set into fields in the record and closes
when all the records have been processed.
eg. FOR emp_rec IN C1 LOOP
salary_total := salary_total +emp_rec sal;
END LOOP;
18 What is a cursor ? Why Cursor is required ?
Cursor is a named private SQL area from where information can be accessed. Cursors are required to process rows individually for queries returning multiple rows.
19 What happens if a procedure that updates a column of table X is called in a database trigger of the same table ?
Mutation of table occurs.
20 What are two virtual tables available during database trigger execution ?
The table columns are referred as OLD.column_name and NEW.column_name.
For triggers related to INSERT only NEW.column_name values only available.
For triggers related to UPDATE only OLD.column_name NEW.column_name values only available.
For triggers related to DELETE only OLD.column_name values only available.
21 What are two parts of package ?
The two parts of package are PACKAGE SPECIFICATION & PACKAGE BODY.
Package Specification contains declarations that are global to the packages and local to the schema.
Package Body contains actual procedures and local declaration of the procedures and cursor declarations.
22 What are the two parts of a procedure ?
Procedure Specification and Procedure Body.
23 What are the return values of functions SQLCODE and SQLERRM ?
SQLCODE returns the latest code of the error that has occurred.
SQLERRM returns the relevant error message of the SQLCODE.
24 What are the PL/SQL Statements used in cursor processing ?
DECLARE CURSOR cursor name, OPEN cursor name, FETCH cursor name INTO or Record types, CLOSE cursor name.
25 What are the modes of parameters that can be passed to a procedure ?
IN,OUT,IN-OUT parameters.
26 What are the datatypes a available in PL/SQL ?
Some scalar data types such as NUMBER, VARCHAR2, DATE, CHAR, LONG, BOOLEAN.
Some composite data types such as RECORD & TABLE.
27 What are the cursor attributes used in PL/SQL ?
%ISOPEN - to check whether cursor is open or not
% ROWCOUNT - number of rows fetched/updated/deleted.
% FOUND - to check whether cursor has fetched any row. True if rows are fetched.
% NOT FOUND - to check whether cursor has fetched any row. True if no rows are featched.
These attributes are proceeded with SQL for Implicit Cursors and with Cursor name for Explicit Cursors.
28 What are the components of a PL/SQL Block ?
Declarative part, Executable part and Exception part.
Datatypes PL/SQL
29 What are the components of a PL/SQL block ?
A set of related declarations and procedural statements is called block.
30 What are advantages fo Stored Procedures /
Extensibility,Modularity, Reusability, Maintainability and one time compilation.
1 What is PL/SQL ?
PL/SQL is a procedural language that has both interactive SQL and procedural programming language constructs such as iteration, conditional branching.
2 Write the order of precedence for validation of a column in a table ?
I. done using Database triggers.
ii. done using Integarity Constraints.
I & ii.
Exception :
3 Where the Pre_defined_exceptions are stored ?
In the standard package.
Procedures, Functions & Packages ;
4 What are % TYPE and % ROWTYPE ? What are the advantages of using these over datatypes?
% TYPE provides the data type of a variable or a database column to that variable.
% ROWTYPE provides the record type that represents a entire row of a table or view or columns selected in the cursor.
The advantages are : I. Need not know about variable's data type
ii. If the database definition of a column in a table changes, the data type of a variable changes accordingly.
5 What will happen after commit statement ?
Cursor C1 is
Select empno,
ename from emp;
Begin
open C1; loop
Fetch C1 into
eno.ename;
Exit When
C1 %notfound;-----
commit;
end loop;
end;
The cursor having query as SELECT .... FOR UPDATE gets closed after COMMIT/ROLLBACK.
The cursor having query as SELECT.... does not get closed even after COMMIT/ROLLBACK.
6 What is the basic structure of PL/SQL ?
PL/SQL uses block structure as its basic structure. Anonymous blocks or nested blocks can be used in PL/SQL.
7 What is Raise_application_error ?
Raise_application_error is a procedure of package DBMS_STANDARD which allows to issue an user_defined error messages from stored sub-program or database trigger.
8 What is Pragma EXECPTION_INIT ? Explain the usage ?
The PRAGMA EXECPTION_INIT tells the complier to associate an exception with an oracle error. To get an error message of a specific oracle error.
e.g. PRAGMA EXCEPTION_INIT (exception name, oracle error number)
9 What is PL/SQL table ?
Objects of type TABLE are called "PL/SQL tables", which are modeled as (but not the same as) database tables, PL/SQL tables use a primary PL/SQL tables can have one column and a primary key.
Cursors
10 What is Overloading of procedures ?
The Same procedure name is repeated with parameters of different datatypes and parameters in different positions, varying number of parameters is called overloading of procedures.
e.g. DBMS_OUTPUT put_line
What is a package ? What are the advantages of packages ?
11 What is difference between a PROCEDURE & FUNCTION ?
A FUNCTION is always returns a value using the return statement.
A PROCEDURE may return one or more values through parameters or may not return at all.
12 What is difference between a Cursor declared in a procedure and Cursor declared in a package specification ?
A cursor declared in a package specification is global and can be accessed by other procedures or procedures in a package.
A cursor declared in a procedure is local to the procedure that can not be accessed by other procedures.
13 What is difference between % ROWTYPE and TYPE RECORD ?
% ROWTYPE is to be used whenever query returns a entire row of a table or view.
TYPE rec RECORD is to be used whenever query returns columns of different
table or views and variables.
E.g. TYPE r_emp is RECORD (eno emp.empno% type,ename emp ename %type
e_rec emp% ROWTYPE
cursor c1 is select empno,deptno from emp;
e_rec c1 %ROWTYPE.
14 What is an Exception ? What are types of Exception ?
Exception is the error handling part of PL/SQL block. The types are Predefined and user defined. Some of Predefined exceptions are.
CURSOR_ALREADY_OPEN
DUP_VAL_ON_INDEX
NO_DATA_FOUND
TOO_MANY_ROWS
INVALID_CURSOR
INVALID_NUMBER
LOGON_DENIED
NOT_LOGGED_ON
PROGRAM-ERROR
STORAGE_ERROR
TIMEOUT_ON_RESOURCE
VALUE_ERROR
ZERO_DIVIDE
OTHERS.
15 What is a stored procedure ?
A stored procedure is a sequence of statements that perform specific function.
16 What is a database trigger ? Name some usages of database trigger ?
Database trigger is stored PL/SQL program unit associated with a specific database table. Usages are Audit data modifications, Log events transparently, Enforce complex business rules Derive column values automatically, Implement complex security authorizations. Maintain replicate tables.
17 What is a cursor for loop ?
Cursor for loop implicitly declares %ROWTYPE as loop index,opens a cursor, fetches rows of values from active set into fields in the record and closes
when all the records have been processed.
eg. FOR emp_rec IN C1 LOOP
salary_total := salary_total +emp_rec sal;
END LOOP;
18 What is a cursor ? Why Cursor is required ?
Cursor is a named private SQL area from where information can be accessed. Cursors are required to process rows individually for queries returning multiple rows.
19 What happens if a procedure that updates a column of table X is called in a database trigger of the same table ?
Mutation of table occurs.
20 What are two virtual tables available during database trigger execution ?
The table columns are referred as OLD.column_name and NEW.column_name.
For triggers related to INSERT only NEW.column_name values only available.
For triggers related to UPDATE only OLD.column_name NEW.column_name values only available.
For triggers related to DELETE only OLD.column_name values only available.
21 What are two parts of package ?
The two parts of package are PACKAGE SPECIFICATION & PACKAGE BODY.
Package Specification contains declarations that are global to the packages and local to the schema.
Package Body contains actual procedures and local declaration of the procedures and cursor declarations.
22 What are the two parts of a procedure ?
Procedure Specification and Procedure Body.
23 What are the return values of functions SQLCODE and SQLERRM ?
SQLCODE returns the latest code of the error that has occurred.
SQLERRM returns the relevant error message of the SQLCODE.
24 What are the PL/SQL Statements used in cursor processing ?
DECLARE CURSOR cursor name, OPEN cursor name, FETCH cursor name INTO or Record types, CLOSE cursor name.
25 What are the modes of parameters that can be passed to a procedure ?
IN,OUT,IN-OUT parameters.
26 What are the datatypes a available in PL/SQL ?
Some scalar data types such as NUMBER, VARCHAR2, DATE, CHAR, LONG, BOOLEAN.
Some composite data types such as RECORD & TABLE.
27 What are the cursor attributes used in PL/SQL ?
%ISOPEN - to check whether cursor is open or not
% ROWCOUNT - number of rows fetched/updated/deleted.
% FOUND - to check whether cursor has fetched any row. True if rows are fetched.
% NOT FOUND - to check whether cursor has fetched any row. True if no rows are featched.
These attributes are proceeded with SQL for Implicit Cursors and with Cursor name for Explicit Cursors.
28 What are the components of a PL/SQL Block ?
Declarative part, Executable part and Exception part.
Datatypes PL/SQL
29 What are the components of a PL/SQL block ?
A set of related declarations and procedural statements is called block.
30 What are advantages fo Stored Procedures /
Extensibility,Modularity, Reusability, Maintainability and one time compilation.
31 Name the tables where characteristics of Package, procedure and functions are stored ?
User_objects, User_Source and User_error.
32 Is it possible to use Transaction control Statements such a ROLLBACK or COMMIT in Database Trigger ? Why ?
It is not possible. As triggers are defined for each table, if you use COMMIT of ROLLBACK in a trigger, it affects logical transaction processing.
33 How packaged procedures and functions are called from the following?
a. Stored procedure or anonymous block
b. an application program such a PRC C, PRO COBOL
c. SQL *PLUS
a. PACKAGE NAME.PROCEDURE NAME (parameters);
variable := PACKAGE NAME.FUNCTION NAME (arguments);
EXEC SQL EXECUTE
b.
BEGIN
PACKAGE NAME.PROCEDURE NAME (parameters)
variable := PACKAGE NAME.FUNCTION NAME (arguments);
END;
END EXEC;
c. EXECUTE PACKAGE NAME.PROCEDURE if the procedures does not have any
out/in-out parameters. A function can not be called.
34 How many types of database triggers can be specified on a table ? What are they ?
Insert Update Delete
Before Row o.k. o.k. o.k.
After Row o.k. o.k. o.k.
Before Statement o.k. o.k. o.k.
After Statement o.k. o.k. o.k.
If FOR EACH ROW clause is specified, then the trigger for each Row affected by the statement.
If WHEN clause is specified, the trigger fires according to the returned Boolean value.
35 Give the structure of the procedure ?
PROCEDURE name (parameter list.....)
is
local variable declarations
BEGIN
Executable statements.
Exception.
exception handlers
end;
36 Give the structure of the function ?
FUNCTION name (argument list .....) Return datatype is
local variable declarations
Begin
executable statements
Exception
execution handlers
End;
37 Explain the usage of WHERE CURRENT OF clause in cursors ?
WHERE CURRENT OF clause in an UPDATE,DELETE statement refers to the latest row fetched from a cursor.
Database Triggers
38 Explain the two type of Cursors ?
There are two types of cursors, Implicit Cursor and Explicit Cursor.
PL/SQL uses Implicit Cursors for queries.
User defined cursors are called Explicit Cursors. They can be declared and used.
39 Explain how procedures and functions are called in a PL/SQL block ?
Function is called as part of an expression.
sal := calculate_sal ('a822');
procedure is called as a PL/SQL statement
calculate_bonus ('A822');
Programmatic Constructs
Last Update: September 06, 2004
1 What are the different types of PL/SQL program units that can be defined and stored in ORACLE database ?
Procedures and Functions,Packages and Database Triggers.
2 What are the differences between Database Trigger and Integrity constraints ?
A declarative integrity constraint is a statement about the database that is always true. A constraint applies to existing data in the table and any statement that manipulates the table.
A trigger does not apply to data loaded before the definition of the trigger, therefore, it does not guarantee all data in a table conforms to the rules established by an associated trigger.
A trigger can be used to enforce transitional constraints where as a declarative integrity constraint cannot be used.
3 What is difference between Procedures and Functions ?
A Function returns a value to the caller where as a Procedure does not.
4 What is Database Trigger ?
A Database Trigger is procedure (set of SQL and PL/SQL statements) that is automatically executed as a result of an insert in,update to, or delete from a table.
5 What is a Procedure ?
A Procedure consist of a set of SQL and PL/SQL statements that are grouped together as a unit to solve a specific problem or perform a set of related tasks.
6 What is a Package ?
A Package is a collection of related procedures, functions, variables and other package constructs together as a unit in the database.
7 What are the uses of Database Trigger ?
Database triggers can be used to automatic data generation, audit data modifications, enforce complex Integrity constraints, and customize complex security authorizations.
8 What are the advantages of having a Package ?
Increased functionality (for example,global package variables can be declared and used by any proecdure in the package) and performance (for example all objects of the package are parsed compiled, and loaded into memory once)
1 With which function of summary item is the compute at options required?
percentage of total functions.
2 Why is it preferable to create a fewer no. of queries in the data model?
Because for each query, report has to open a separate cursor and has to rebind, execute and fetch data.
3 Why is a Where clause faster than a group filter or a format trigger?
Because, in a where clause the condition is applied during data retrieval than after retrieving the data.
4 Which parameter can be used to set read level consistency across multiple queries?
Read only.
5 Which of the two views should objects according to possession?
view by structure.
6 Which of the above methods is the faster method?
performing the calculation in the query is faster.
7 Where is the external query executed at the client or the server?
At the server.
8 Where is a procedure return in an external pl/sql library executed at the client or at the server?
At the client.
9 When do you use data parameter type?
When the value of a data parameter being passed to a called product is always the name of the record group defined in the current form. Data parameters are used to pass data to produts invoked with the run_product built-in subprogram.
10 When a form is invoked with call_form, Does oracle forms issues a save point?
Yes
11 What are the important difference between property clause and visual attributes?
Named visual attributes differ only font, color & pattern attributes, property clauses can contain this and any other properties. You can change the appearance of objects at run time by changing the named visual attributes programmatically , property clause assignments cannot be changed programmatically. When an object is inheriting from both a property clause and named visual attribute, the named visual attribute settings take precedence, and any visual attribute properties in the class are ignored.
12 What use of command line parameter cmd file?
It is a command line argument that allows you to specify a file that contain a set of arguments for r20run.
13 What is WHEN-Database-record trigger?
Fires when oracle forms first marks a record as an insert or an update. The trigger fires as soon as oracle forms determines through validation that the record should be processed by the next post or commit as an insert or update. c generally occurs only when the operators modifies the first item in the record, and after the operator attempts to navigate out of the item.
14 What is use of term?
The term file which key is correspond to which oracle report functions.
15 What is trigger associated with the timer?
When-timer-expired.
16 What is the use of transactional triggers?
Using transactional triggers we can control or modify the default functionality of the oracle forms.
17 What is the use of place holder column?
A placeholder column is used to hold calculated values at a specified place rather than allowing is to appear in the actual row where it has to appear.
18 What is the use of image_zoom built-in?
To manipulate images in image items.
19 What is the use of hidden column?
A hidden column is used to when a column has to embed into boilerplate text.
20 What is the use of break group?
A break group is used to display one record for one group ones. While multiple related records in other group can be displayed.
21 What is the remove on exit property?
For a modelless window, it determines whether oracle forms hides the window automatically when the operators navigates to an item in the another window.
22 What is the purpose of the product order option in the column property sheet?
To specify the order of individual group evaluation in a cross products.
23 What is the maximum no of chars the parameter can store?
The maximum no of chars the parameter can store is only valid for char parameters, which can be upto 64K. No parameters default to 23Bytes and Date parameter default to 7Bytes.
24 What is the main diff. bet. Reports 2.0 & Reports 2.5?
Report 2.5 is object oriented.
25 What is the frame & repeating frame?
A frame is a holder for a group of fields. A repeating frame is used to display a set of records when the no. of records that are to displayed is not known before.
26 What is the difference between OLE Server & Ole Container?
An Ole server application creates ole Objects that are embedded or linked in ole Containers ex. Ole servers are ms_word & ms_excel. OLE containers provide a place to store, display and manipulate objects that are created by ole server applications. Ex. oracle forms is an example of an ole Container.
27 What is the difference between object embedding & linking in Oracle forms?
In Oracle forms, Embedded objects become part of the form module, and linked objects are references from a form module to a linked source file.
28 What is the difference between boiler plat images and image items?
Boiler plate Images are static images (Either vector or bit map) that you import from the file system or database to use a graphical elements in your form, such as company logos and maps. Image items are special types of interface controls that store and display either vector or bitmap images. Like other items that store values, image items can be either base table items(items that relate directly to database columns) or control items. The definition of an image item is stored as part of the form module FMB and FMX files, but no image file is actually associated with an image item until the item is populate at run time.
29 What is the difference between $$DATE$$ & $$DBDATE$$ $$DBDATE$$ retrieves the current database date $$date$$ retrieves the current operating system date.
30 What is the diff. when Flex mode is mode on and when it is off?
When flex mode is on, reports automatically resizes the parent when the child is resized.
31 What is the diff. when confine mode is on and when it is off?
When confine mode is on, an object cannot be moved outside its parent in the layout.
32 What is the diff. bet. setting up of parameters in reports 2.0 reports 2.5?
LOVs can be attached to parameters in the reports 2.5 parameter form.
33 What is the advantage of the library?
Libraries provide a convenient means of storing client-side program units and sharing them among multiple applications. Once you create a library, you can attach it to any other form, menu, or library modules. When you can call library program units from triggers menu items commands and user named routine, you write in the modules to which you have attach the library. When a library attaches another library, program units in the first library can reference program units in the attached library. Library support dynamic loading-that is library program units are loaded into an application only when needed. This can significantly reduce the run-time memory requirements of applications.
34 What is term?
The term is terminal definition file that describes the terminal form which you are using r20run.
35 What is system.coordination_operation?
It represents the coordination causing event that occur on the master block in master-detail relation.
36 What is synchronize?
It is a terminal screen with the internal state of the form. It updates the screen display to reflect the information that oracle forms has in its internal representation of the screen.
37 What is strip sources generate options?
Removes the source code from the library file and generates a library files that contains only pcode. The resulting file can be used for final deployment, but can not be subsequently edited in the designer. ex. f45gen module=old_lib.pll userid=scott/tiger strip_source YES output_file
38 What is relation between the window and canvas views?
Canvas views are the back ground objects on which you place the interface items (Text items), check boxes, radio groups etc.,) and boilerplate objects (boxes, lines, images etc.,) that operators interact with us they run your form . Each canvas views displayed in a window.
39 What is pop list?
The pop list style list item appears initially as a single field (similar to a text item field). When the operator selects the list icon, a list of available choices appears.
40 What is new_form built-in?
When one form invokes another form by executing new_form oracle form exits the first form and releases its memory before loading the new form calling new form completely replace the first with the second. If there are changes pending in the first form, the operator will be prompted to save them before the new form is loaded.
41 What is lexical reference? How can it be created?
Lexical reference is place_holder for text that can be embedded in a sql statements. A lexical reference can be created using & before the column or parameter name.
42 What is forms_DDL?
Issues dynamic Sql statements at run time, including server side pl/SQl and DDL
43 What is difference between open_form and call_form?
when one form invokes another form by executing open_form the first form remains displayed, and operators can navigate between the forms as desired. when one form invokes another form by executing call_form, the called form is modal with respect to the calling form. That is, any windows that belong to the calling form are disabled, and operators cannot navigate to them until they first exit the called form.
44 What is bind reference and how can it be created?
Bind reference are used to replace the single value in sql, pl/sql statements a bind reference can be created using a (:) before a column or a parameter name.
45 What is an user exit used for?
A way in which to pass control (and possibly arguments ) form Oracle report to another Oracle products of 3 GL and then return control ( and ) back to Oracle reports.
46 What is an OLE?
Object Linking & Embedding provides you with the capability to integrate objects from many Ms-Windows applications into a single compound document creating integrated applications enables you to use the features form .
47 What is an object group?
An object group is a container for a group of objects; you define an object group when you want to package related objects, so that you copy or reference them in other modules.
48 What is an anchoring object & what is its use?
An anchoring object is a print condition object which used to explicitly or implicitly anchor other objects to itself.
49 What is a User_exit?
Calls the user exit named in the user_exit_string. Invokes a 3Gl program by name which has been properly linked into your current oracle forms executable.
50 What is a timer?
Timer is an "internal time clock" that you can programmatically create to perform an action each time the timer expires.
51 What is a Text_io Package?
It allows you to read and write information to a file in the file system.
52 What is a text list?
The text list style list item appears as a rectangular box which displays the fixed number of values. When the text list contains values that can not be displayed, a vertical scroll bar appears, allowing the operator to view and select undisplayed values.
53 What is a property clause?
A property clause is a named object that contains a list of properties and their settings. Once you create a property clause you can base other object on it. An object based on a property can inherit the setting of any property in the clause that makes sense for that object.
54 What is a physical page ? & What is a logical page ?
A physical page is a size of a page. That is output by the printer. The logical page is the size of one page of the actual report as seen in the Previewer.
55 What is a library?
A library is a collection of subprograms including user named procedures, functions and packages.
56 What is a difference between pre-select and pre-query?
Fires during the execute query and count query processing after oracle forms constructs the select statement to be issued, but before the statement is actually issued. The pre-query trigger fires just before oracle forms issues the select statement to the database after the operator as define the example records by entering the query criteria in enter query mode. Pre-query trigger fires before pre-select trigger.
57 What is a combo box?
A combo box style list item combines the features found in list and text item. Unlike the pop list or the text list style list items, the combo box style list item will both display fixed values and accept one operator entered value.
58 What does the term panel refer to with regard to pages?
A panel is the no. of physical pages needed to print one logical page.
59 What are visual attributes?
Visual attributes are the font, color, pattern proprieties that you set for form and menu objects that appear in your application interface.
60 What are three panes that appear in the run time pl/sql interpreter?
1.Source pane. 2. interpreter pane. 3. Navigator pane.
Regards
B RANGARAJAN

SQL Express 2008 R2 - CREATE DATABASE permission denied in database 'master'

I have created a setup application with SQLEXpress 2008 as a prerequisite. On test SQLExpress installs OK
after the application is installed it must create and install a database using a mixture of SMO and Scripting. I used SMO to add the current user (who is a Windows Administrator) as a Login to the SQL Express server.
Dim l As Login = New Login(srv, My.User.Name)
                l.LoginType = LoginType.WindowsUser
                l.AddToRole("sysadmin")
                l.DefaultDatabase = "MASTER"
                l.Create()
It fails on srv.CreateDatabase with error message "permission denied in database MASTER"
this thread talks about converting the server to single user mode before adding a login
http://social.msdn.microsoft.com/Forums/en-US/sqlexpress/thread/86daf5f5-d333-40b1-ae6f-0da052a96600
how is it possible to scrip this? there is no documentation i can find.
the database must be installed in the ProgramData folder. Is there a permissions issue with this. Do I need to assign permissions to this folder somehow?
bear in mind this will be a remote install and the user expects it work flawlessly.  No manual interventions

if i connect to the sqlexpress instance (local)\SQLEXPRESSS using SQL Management Studio and try to modify the Windows User Login I get the error message:
"User does not have permission to perform this action. (Microsoft SQL Server, Error: 15247)"
how is this possible. it seems to be at an impasse. can't go forward or backward
Now try launching Managenment Studio by right clicking on shortcut and choosing "Run As Adminitstartor".
If above works then you are running on Windows 2008 family OS (Vista, 2k8 or Win7) which has
UAC feature.
If above does not work then you really don't have permission then follow below.
Troubleshooting: Connecting to SQL Server When System Administrators Are Locked Out
Start the instance of SQL Server in single-user mode by using either the
-m or
-f options. Any member of the computer's local Administrators group can then connect to the instance of SQL Server as a member of the
sysadmin fixed server role.
http://msdn.microsoft.com/en-us/library/dd207004.aspx
Balmukund Lakhani | Please mark solved if I've answered your question, vote for it as helpful to help other user's find a solution quicker
This posting is provided "AS IS" with no warranties, and confers no rights.
My Blog: http://blogs.msdn.com/blakhani
Team Blog: http://blogs.msdn.com/sqlserverfaq

Using sql expression in filter

Hi Experts,
I have a question using 'sql expression' in filters in answers. Let's say i have a date filter and i would like the value for that date as max(tablename.colname). Please tell me the syntax for passing this.
One more question is i have a date prompt the data will be refreshed weekly let's say the data refreshed like this *08/1/11 ,08/8/11 and 08/15/11* . Now if i select 08/08/11 it will show the data
populated on *08/08/11* which is ok but if i select *08/09/11 to 08/14/11* it show only *08/08/11* data. Same way if select *08/16/11 or 09/16/11* it should show the last refreshed data which is *08/15/11*
Thanks in Advance.
chak

Ok, so you want the report to be restricted as of last refresh date when your selects a date in prompt which is beyond/greater than the last refresh date.
One way of doing this can be as below:
- Capture the last refresh date in a repository variable. So this variable will always hold a value for last refresh date.
- In prompts, capture the date selected by user in a presentation variable and apply the below statement in the Advanced SQL of the report.
DateColumn = case when Timestamp '@{pvar}{2011-01-01 00:00:00}' <= valueof("lastRefDate") then timestamp '@{pvar}{2011-01-01 00:00:00}' else valueof("lastRefDate") end
Here pvar is your presentation var and lastRefDate is your rep variable holding the last refresh date. What this statement would do is if user selects a date which is less that equal to last refresh date, then report will be filtered as of that date. Else, the report will be filtered by value of the Last Refresh date.
Thanks

Error in SQL Expression

Hello All,
I am having crystal reports XI and I am using OLE DB ADO connection for oracle driver to the DB.
I took a correct SQL expression from a previous report which is working fine and then paste it in a new created SQL Expression in the new report. The exact tables are there. But when clicking on the tick button to check of there are some errors, a message is shown that : ORA-00942 table or view does not exist.
Here is the SQl Expression:
(select MAX(intrates.RATE_DT)
FROM INTRATES,SECTYPE,DEALS,SECISSUE
WHERE sectype.thekey = "posnrpt"."SECTYPE"
AND SECISSUE.THEKEY = SECTYPE.SECISSUE_ID
AND LTRIM(RTRIM(UPPER(intrates.ISSUER_DETAIL_ID))) =LTRIM(RTRIM(UPPER('ID'||secissue.ISIN)))
AND INTRATES.RATE_DT <= "posnrpt"."POSN_DT"
I am wondering why it is working in a previous report which is created long time ago and now it is not working?
Is it from the driver or I have to do further modifications!!!
I am looking forward for your help.

Good question, Jason. The only officially supported use would be of the functions and operators explicitly listed within the editor. The SAP Note referenced in my presentation gives a little more information:
[1217871 - What is the intended use of 'SQL Expression' fields?|http://www.google.com/url?sa=t&source=web&cd=1&sqi=2&ved=0CBIQFjAA&url=http%3A%2F%2Fwww.sdn.sap.com%2Firj%2Fscn%2Fgo%2Fportal%2Fprtroot%2Fdocs%2Foss_notes_boj%2Fsdn_oss_boj_erq%2Fsap(bD1lbiZjPTAwMQ%3D%3D)%2Fbc%2Fbsp%2Fspn%2Fscn_bosap%2Fnotes%257B6163636573733d36393736354636443646363436353344333933393338323636393736354637333631373036453646373436353733354636453735364436323635373233443330333033303331333233313337333833373331%257D.do&ei=FtWHTMrpCoTQ8wTutsHfDg&usg=AFQjCNFZG-Ta5JiZFAzXf2HC5GE7-QkJug]
I'm sure the reason the SELECT statements aren't officially supported is that they aren't written in Crystal syntax. What one is able to do with a SELECT statement depends on the database (Access, Oracle, MS SQL Server, etc..), type of database connection (Native, ODBC, etc..) the flavor of SQL being used, which is dependent on the previous two, etc.. Even the functions and operators available in the editor depend on the above conditions. What you see as available may not be what I see..
So, while SAP can support the feature as a whole, they can't necessarily provide syntax support, nor guarantee effectiveness. There's also very little documentation on them, as a result. A lot of what I've learned to do with SQL Expressions has been through trial and error.
Personally, I prefer to build reports against Views, if possible, and Commands or Stored Procedures, if necessary. SQL Expressions are great, though, in a pinch against existing reports with performance or design issues. In the case of the report above, I was able to dramatically increase performance and eliminate sub-reports in an existing report that was written by another individual. Without the SQL Expressions, I would have had to write even more complicated SQL and rebuild the report.
Since I can use them and I know how powerful they can be, I'll keep using them until I can't. At this point in time, they work with Crystal Reports 2008, which has a very low adoption rate, and I haven't heard of them being deprecated in Crystal Reports 2011, which I expect to be around for several years, so I'm not too concerned.
~Kurt

SQL expression not working, newbie. Malformed?

Hi, I'm a newbie to CR. I've got a report that works which I want to add a SQL expression field to that returns the text from a column in one table when another column in that table is equal to the string result of concatenating the values of two columns from a different table.
This is my SQL expression. I'm using CR XI R2.
SELECT
    "Windows_Notes"."NOTES_61"
WHERE
    ("Windows_Notes"."KEY_61" = '"RMA_Detail"."RMANUM_52" + "RMA_Detail"."RMALIN_52"')
    AND ("Windows_Notes"."LINE_61" = '0000')
There are actually two WHERE clauses as you can see above. Anyway, this isn't returning any data even though I can see in SQL Server Management Studio that the data is there. Even if I get rid of the concatenation and use a static value that I know should work (like '8000002501'), I get no results. As soon as I insert this SQL expression field into the report, the whole page is just blank. If I remove it again, everything shows up like before.
Any hints or solutions? I just made my first report last night, so this may be a stupid question.
Thank you.

Thanks to you both for the performance tips. I got it working just before you guys answered with this line:
{Windows_Notes.KEY_61} = {RMA_Detail.RMANUM_52}+{RMA_Detail.RMALIN_52} and {Windows_Notes.LINE_61} = '0000'
And now I've run into yet another fun problem. This one may be more difficult to tackle. Sometimes there will be no rows returned from that query. If there is a result I am including a string in the report from Windows_Notes.NOTES_61 which just contains optional notes for RMA numbers in our company. (like a short description of the customer's problem)
Sometimes there are no notes entered. When this is the case, the report is no longer showing those RMAs, heh. How can I get it to just display nothing in the notes column but still show the rest of the fields when that query returns no rows?
I tried removing the previous code from the record selection forumula, then creating a formula field with the following:
if ({Windows_Notes.KEY_61} = {RMA_Detail.RMANUM_52}+{RMA_Detail.RMALIN_52} and {Windows_Notes.LINE_61} = '0000') then (
    {Windows_Notes.NOTES_61}
And I insterted that formula field onto the report instead of the Windows_Notes.NOTES_61 database column directly. It didn't work. I'm not clever enough after one day's experience with Crystal Reports...

SQL Expression Question

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