About SELECT statement

Hi,
I have a table say XYZ, the only operation performed on the table is insert(no update or delete). The table can be accessed by other applications also but always read only mode.
I'm executing a simple query
SELECT * FROM XYZ
Is it safe to assume that the result is always in same order (with newrecords appended at end)?
Regards,
Mayur.

Hi Mayur,
I would rather mean it is NOT safe to say that. I did some tests but cannot prove it is unsafe if the optimizer is chosing a full table scan, which is still insuffisant to say it is safe.
If the optimizer is chosing another plan, then you may have surprises, and a newer/older oracle version/patch may produce a different plan...
drop table t1;
create table t1 (n1 number, n2 number primary key) organization index;
exec for i in 1 .. 10 loop insert into t1 values (i,1001-i); end loop
commit;
select * from t1;
        N1         N2
        10        991
         9        992
         8        993
         7        994
         6        995
         5        996
         4        997
         3        998
         2        999
         1       1000
10 rows selected.
Execution Plan
   0      SELECT STATEMENT Optimizer=ALL_ROWS (Cost=2 Card=10 Bytes=260)
   1    0   INDEX (FAST FULL SCAN) OF 'SYS_IOT_TOP_40332' (INDEX (UNIQUE)) (Cost=2 Card=10 Bytes=260)Best regards
Laurent

Similar Messages

Doubt about Select statement.

Hi folks!!
             I have a few doubts about the select statements, it may be a silly things but its useful for me.
what is   difference between below statment.
1)SELECT * FROM TABLE.
2)SELECT SINGLE * FROM TABLE
3)SELECT SINGLE FROM TABLE.
Hope i will get answer,thanks in advance.
Regards
Richie..

Hi,
try this and if possible use sap help.i mean place the cursor on select and press F1.
             Types of select statements:
1.     select * from ztxlfa1 into table it.
             This is simple select statement to fetch all the data of db table into internal table it.
   2.   select * from ztxlfa1 into table it where lifnr between 'V2' and 'V5'.
        Thisis using where condition between v2 and v5.
4. select * from ztxlfa1 where land1 = 'DE'. "row goes into default table work Area
5. select lifnr land1 from ztxlfa1
        into corresponding fields of it   "notice 'table' is omitted
         where land1 = 'DE'.
          append it.
           endselect.
     Now data will go into work area. and then u will add it to internal table by
        append statement.
6.   Table 13.2 contains a list of the various forms of select as it is used with internal tables and their relative efficiency. They are in descending order of most-to-least efficient.
Table 13.2 Various Forms of SELECT when Filling an Internal Table
Statement(s)                                   Writes To
select into table it                                    Body
select into corresponding fields of table it   Body
select into it                                    Header line
select into corresponding fields of it           Header line
7. SELECT VBRK~VBELN
       VBRK~VKORG
       VBRK~FKDAT
       VBRK~NETWR
       VBRK~WAERK
       TVKOT~VTEXT
       T001~BUKRS
       T001~BUTXT
    INTO CORRESPONDING FIELDS OF TABLE IT_FINAL
    FROM VBRK
    INNER JOIN TVKOT ON VBRKVKORG = TVKOTVKORG
    INNER JOIN T001 ON VBRKBUKRS = T001BUKRS
    WHERE VBELN IN DOCNUM AND VBRK~FKSTO = ''
   AND VBRK~FKDAT in date.
Select statement using inner joins for vbrk and t001 and tvkot table for this case based on the conditions
8. SELECT T001W~NAME1 INTO TABLE IT1_T001W
FROM T001W INNER JOIN EKPO ON T001WWERKS = EKPOWERKS
WHERE EKPO~EBELN = PURORD.
here selecting a single field into table it1_t001winner join on ekpo.
9. SELECT BUKRS LIFNR EBELN FROM EKKO INTO CORRESPONDING FIELDS OF IT_EKKO WHERE     EBELN IN P_O_NO.
ENDSELECT.
SELECT BUTXT   FROM T001 INTO IT_T001 FOR ALL ENTRIES IN IT_EKKO WHERE BUKRS = IT_EKKO-BUKRS.
ENDSELECT.
APPEND IT_T001.
here I am using for all entries statement with select statement. Both joins and for all entries used to fetch the data on condition but for all entries is the best one.
10. SELECT AVBELN BVTEXT AFKDAT CBUTXT ANETWR AWAERK INTO TABLE ITAB
             FROM VBRK AS A
             INNER JOIN TVKOT AS B ON
             AVKORG EQ BVKORG
             INNER JOIN T001 AS C ON
             ABUKRS EQ CBUKRS
             WHERE AVBELN IN BDOCU AND AFKSTO EQ ' ' AND B~SPRAS EQ
             SY-LANGU
             AND AFKDAT IN BDATE AND AVBELN EQ ANY ( SELECT VBELN FROM
            VBRP WHERE VBRP~MATNR EQ ITEMS ).
    Here we are using sub query in inner join specified in brackets.
Thanks,
chandu.

Select statement operators in ecc 6.

Hi Experts,
I have a small doubt about the '>=' ( greater than or equal to ) operator usage in select statement. Is this operator by any chance perform not as desired in ECC 6.0. Is it a good option to use 'GE' instead of '>='. ?
It may sound a bit awkward, but still I would like to know. I am facing a situation, which could be related to this. An early response would be highly appreciated.
I would request,you NOT TO REPLY with links/explanations which says how to use select statement. Only answer if you have the answers related to this query.
Regards,
Sandipan

>
Jaideep Sharma wrote:
> Hi,
> The only difference is GE will take a little more time than >= as system need to convert the keyword into actual operator when fetching data from Database.
>
> KR Jaideep,
????? Every Open SQL statements is translated to the SQL slang the underlying database is talking regardless if you type GE or >=
If the result differs using >= or GE i would open a call at SAP instead of asking in SDN.

Using if the else logic in regards to a select statement for a report

Hi all,
I've a question regarding if then else logic in Oracle.
I'm developing a report application which contains 3 selectlists
- ProductGroup - SubGroup - Manufacturer
Each one containing several values. And are based on eachother, meaning if you select an item from the PG list, you only get the SG items regarding the PG item you've choosen before. The process logic should be as the following:
When a user selects one item from for example the PG list, the query will be:
select * from x where PG = :P_PG
and the report displays all the items in the PG category selected
The other two bindvariables would be null as the user didn't pick them
If he then proceeds and selects one item from the SG list, the query would be:
select * from x where PG = :P_PG and SG = :P_SG
and the report displays all the items in the PG and SG category selected
If he then proceeds and selects one item from the MA list, the query would be:
select * from x where PG = :P_PG and SG = :P_SG and MA =:P_MA
and the report displays all the items in the PG and SG and MA category selected
Now, I've read some documentation about the decode function, but I can't figure it out, please help.
Peter

Okay, Chet, have set it up on htmldb, so you can see my problem, will go in high detail, it is not producing what I want. Example on htmldb:
DEMO/test
http://htmldb.oracle.com/pls/otn/f?p=33229:6
Defenitions:
3 LOV's, namely:
- LOVPG - select distinct productgroep, productgroep pg from plijst
- LOVSG - select distinct subgroep, subgroep sg from plijst where productgroep = :P6_LOVPG
- LOVLE- select distinct leverancier, leverancier le from plijst where productgroep = :P6_LOVPG and subgroep = :P6_LOVSG
3 Selectitems with submit, namely:
- :P6_LOVPG
- :P6_LOVSG
- :P6_LOVLE
Report region select statement:
select * from plijst where (productgroep = :P6_LOVPG or :P6_LOVPG IS NULL) and (subgroep = :P6_LOVSG or :P6_LOVSG IS NULL) and (leverancier = :P6_LOVLE or :P6_LOVLE IS NULL)
Branch to:
Branche to page on submit after processing
What it should do is:
When you select an item from the first selectlist, productgroep, the report should show all rows containing the specified productgroep.
When the user selects the next item in the subgroep selectlist, the report should show all rows containing the previously selected prodctgroup and the just selected subgroep.
When the user selects the final item , the report should show all rows based on all three selected itemvalues, productgroep, subgroep, leverancier.
The problem is that with this setup the report is only generated after the final selectlist choice of the user. But the user should see a report before that, going deeper into the structure. Hope, you see my problem?
Sincerely,
Pete

A trouble with "LIKE" in a select statement

Hi!
I'm having trouble with "LIKE" in a select statement...
With Access I can make the following and everything works well:
SELECT name, birthday
FROM client
WHERE birthday LIKE '*/02/*';
but if try to do it in my application (it uses Access), it doesn't work - I just can't understand that!!!
In my application the "month" is always the currently month taken from the "System". Look what I'm doing...
String query1 = "SELECT name, birthday " +
          "FROM client " +
          "WHERE birthday " +
          "LIKE '*/" +
          pMonth +
          "/*' " +
          "ORDER BY birthday ASC ";
ResultSet rs = statement1.executeQuery(consulta1);
boolean moreRecords = rs.next();
The variable "moreRecords" is always "false", the query returns nothing although the table "client" has records that attend the query.
Please, anyone can help me?! It's a little bit urgent.
Thanks,
Katia.

Hi Katia,
I'll bet the problem lies with the characters you're using to escape the LIKE clause. You're using the ones that Access likes to see, but that's not necessarily what's built into the JDBC-ODBC driver class.
You can find out what the correct escape wildcard characters are from the java.sql.DatabaseMetaData.getSearchStringEscape() method. It'll tell you what to use in the LIKE clause.
I'm not 100% sure about your code. It doesn't use query1 anywhere. I'd do this:
String query = "SELECT name, birthday FROM client WHERE birthday LIKE ? ORDER BY birthday ASC";
PreparedStatement statement = connection.createStatement(query);
String escape = connection.getMetaData().getSearchStringEscape();
String test = escape + '/' + pMonth + '/' + escape;
statement.setString(1, test);
ResultSet rs = statement.executeQuery();
while (rs.hasNext())
// load your data into a data structure to pass back.
rs.close();
statement.close();Let me know if that works. - MOD

Select statement in a function does Full Table Scan

All,
I have been coding a stored procedure that writes 38K rows in less than a minute. If I add another column which requires call to a package and 4 functions within that package, it runs for about 4 hours. I have confirmed that due to problems in one of the functions, the code does full table scans. The package and all of its functions were written by other contractors who have been long gone.
Please note that case_number_in (VARCHAR2) and effective_date_in (DATE) are parameters sent to the problem function and I have verified through TOAD’s debugger that their values are correct.
Table named ps2_benefit_register has over 40 million rows but case_number is an index for that table.
Table named ps1_case_fs has more than 20 million rows but also uses case_number as an index.
Select #1 – causes full table scan runs and writes 38K rows in a couple of hours.
{case}
SELECT max(a2.application_date)
INTO l_app_date
FROM dwfssd.ps2_benefit_register a1, dwfssd.ps2_case_fs a2
WHERE a2.case_number = case_number_in and
a1.case_number = a2.case_number and
a2.application_date <= effective_date_in and
a1.DOCUMENT_TYPE = 'F';
{case}
Select #2 – runs – hard coding values makes the code to write the same 38K rows in a few minutes.
{case}
SELECT max(a2.application_date)
INTO l_app_date
FROM dwfssd.ps2_benefit_register a1, dwfssd.ps2_case_fs a2
WHERE a2.case_number = 'A006438' and
a1.case_number = a2.case_number and
a2.application_date <= '01-Apr-2009' and
a1.DOCUMENT_TYPE = 'F';
{case}
Why using the values in the passed parameter in the first select statement causes full table scan?
Thank you for your help,
Seyed
Edited by: user11117178 on Jul 30, 2009 6:22 AM
Edited by: user11117178 on Jul 30, 2009 6:23 AM
Edited by: user11117178 on Jul 30, 2009 6:24 AM

Hello Dan,
Thank you for your input. The function is not determinsitic, therefore, I am providing you with the explain plan. By version number, if you are refering to the Database version, we are running 10g.
PLAN_TABLE_OUTPUT
Plan hash value: 2132048964
| Id | Operation                     | Name                    | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
|   0 | SELECT STATEMENT              |                         |   324K|    33M| 3138   (5)| 00:00:38 |       |       |
|* 1 | HASH JOIN                    |                         |   324K|    33M| 3138   (5)| 00:00:38 |       |       |
|   2 |   BITMAP CONVERSION TO ROWIDS |                         |     3 |     9 |     1   (0)| 00:00:01 |       |       |
|* 3 |    BITMAP INDEX FAST FULL SCAN| IDX_PS2_ACTION_TYPES    |       |       |            |          |       |       |
|   4 |   PARTITION RANGE ITERATOR    |                         |   866K|    87M| 3121   (4)| 00:00:38 |   154 |   158 |
|   5 |    TABLE ACCESS FULL          | PS2_FS_TRANSACTION_FACT |   866K|    87M| 3121   (4)| 00:00:38 |   154 |   158 |
Predicate Information (identified by operation id):
   1 - access("AL1"."ACTION_TYPE_ID"="AL2"."ACTION_TYPE_ID")
   3 - filter("AL2"."ACTION_TYPE"='1' OR "AL2"."ACTION_TYPE"='2' OR "AL2"."ACTION_TYPE"='S')
Thank you very much,
Seyed

Return multiple values from a function to a SELECT statement

I hope I've provided enough information here. If not, just let me know what I'm missing.
I am creating a view that will combine information from a few tables. Most of it is fairly straightforward, but there are a couple of columns in the view that I need to get by running a function within a package. Even this is fairly straightforward (I have a function named action_date in a package called rp, for instance, which I can use to return the date I need via SELECT rp.action_date(sequence_number).
Here's the issue: I actually need to return several bits of information from the same record (not just action_date, but also action_office, action_value, etc.) - a join of the tables won't work here as I'll explain below. I can, of course, run a separate function for each statement but that is obviously inefficient. Within the confines of the view select statement however, I'm not sure how to return each of the values I need.
For instance, right now, I have:
Table1:
sequence_number NUMBER(10),
name VARCHAR(30),
Table2:
Table1_seq NUMBER(10),
action_seq NUMBER(10),
action_date DATE,
action_office VARCHAR(3),
action_value VARCHAR(60),
I can't simply join Table1 and Table2 because I have to do some processing in order to determine which of the matching returned rows I actually need to select. So the package opens a cursor and processes each row until it finds the one that I need.
The following works but is inefficient since all of the calls to the package will return columns from the same record. I just don't know how to return all the values I need into the SELECT statement.
CREATE VIEW all_this_stuff AS
SELECT sequence_number, name,
rp.action_date(sequence_number) action_date,
rp.action_office(sequence_number) action_office,
rp.action_value(sequence_number) action_value
FROM table1
Is there a way to return multiple values into my SELECT statement or am I going about this all wrong?
Any suggestions?
Thanks so much!

Hi,
What you want is a Top-N Query , which you can do using the analytic ROW_NUMBER function in a sub-query, like this:
WITH     got_rnum     AS
     SELECT     action_seq, action_dt, action_office, action_type, action_value
     ,     ROW_NUMBER () OVER ( ORDER BY action_date
                               ,            action_seq
                         ,            action_serial
                       ) AS rnum
     FROM     table2
     WHERE     action_code     = 'AB'
     AND     action_office     LIKE 'E'     -- Is this right?
SELECT     action_seq, action_dt, action_office, action_type, action_value
FROM     got_rnum
WHERE     rnum     = 1
;As written, this will return (at most) one row.
I suspect you'll really want to get one row for each group , where a group is defined by some value in a table to which you're joining.
In that case, add a PARTITION BY clause to the ROW_NUMBER function.
If you'd post a little sample data (CREATE TABLE and INSERT statements), I could show you exactly how.
Since I don't have your tables, I'll show you using tables in the scott schema.
Here's a view that has data from the scott.dept table and also from scott.emp, but only for the most senior employee in each department (that is, the employee with the earliest hiredate). If there happens to be a tie for the earliest hiredate, then the contender with the lowest empno is chosen.
CREATE OR REPLACE VIEW     senior_emp
AS
WITH     got_rnum     AS
     SELECT     d.deptno
     ,     d.dname
     ,     e.empno
     ,     e.ename
     ,     e.hiredate
     ,     ROW_NUMBER () OVER ( PARTITION BY d.deptno
                               ORDER BY         e.hiredate
                         ,                e.empno
                       ) AS rnum
     FROM     scott.dept     d
     JOIN     scott.emp     e     ON     d.deptno     = e.deptno
SELECT     deptno
,     dname
,     empno
,     ename
,     hiredate
FROM     got_rnum
WHERE     rnum     = 1
SELECT     *
FROM     senior_emp
;Output:
.    DEPTNO DNAME               EMPNO ENAME      HIREDATE
        10 ACCOUNTING           7782 CLARK      09-JUN-81
        20 RESEARCH             7369 SMITH      17-DEC-80
        30 SALES                7499 ALLEN      20-FEB-81
By the way, one of the conditions in the query you posted was
action_office     LIKE 'E'which is equivalent to
action_office     = 'E'(LIKE is always equivalent to = if the string after LIKE doesn't contain any wildcards.)
Did you mean to say that, or did you mean something like this:
action_office     LIKE 'E%'instead?

SELECT statement in stored procedure

I want to be able to execute a simple SELECT statement from within a stored procedure and return a stream of data which consists of all the rows from the SELECT statement.
Ultimately, I want to ouput this stream of data to a Crystal Report.
Apparently, Oracle will not allow you to execute a simple SELECT statement from within a stored procedure. It will only allow execution of a SELECT INTO statment, which requires that you define a cursor, etc. etc.
Any way around this?
Thanks
Bill

Look into REF CURSORs. Still not sure about whether APEX uses them though.... Good luck.

Problem with Select Statements

Hi All,
I have a performance problem for my report because of the following statements.
How can i modify the select statements for improving the performance of the report.
DATA : shkzg1h LIKE bsad-shkzg,
         shkzg1s LIKE bsad-shkzg,
         shkzg2h LIKE bsad-shkzg,
         shkzg2s LIKE bsad-shkzg,
         shkzg1hu LIKE bsad-shkzg,
         shkzg1su LIKE bsad-shkzg,
         shkzg2hu LIKE bsad-shkzg,
         shkzg2su LIKE bsad-shkzg,
         kopbal1s LIKE bsad-dmbtr,
         kopbal2s LIKE bsad-dmbtr,
         kopbal1h LIKE bsad-dmbtr,
         kopbal2h LIKE bsad-dmbtr,
         kopbal1su LIKE bsad-dmbtr,
         kopbal2su LIKE bsad-dmbtr,
         kopbal1hu LIKE bsad-dmbtr,
         kopbal2hu LIKE bsad-dmbtr.
*These statements are in LOOP.
    SELECT shkzg SUM( dmbtr )
      INTO (shkzg1s , kopbal1s)
      FROM bsid
     WHERE bukrs = ibukrs
       AND kunnr = ktab-kunnr
       AND budat < idate-low
       AND shkzg = 'S'
       AND umskz EQ ''
     GROUP BY shkzg.
    ENDSELECT.
    SELECT shkzg SUM( dmbtr )
      INTO (shkzg1su , kopbal1su)
      FROM bsid
     WHERE bukrs = ibukrs
       AND kunnr = ktab-kunnr
       AND budat < idate-low
       AND shkzg = 'S'
       AND umskz IN zspgl
     GROUP BY shkzg.
    ENDSELECT.
    SELECT shkzg SUM( dmbtr )
      INTO (shkzg1h , kopbal1h)
      FROM bsid
     WHERE bukrs = ibukrs
       AND kunnr = ktab-kunnr
       AND budat < idate-low
       AND shkzg = 'H'
       AND umskz EQ ''
     GROUP BY shkzg.
    ENDSELECT.
    SELECT shkzg SUM( dmbtr )
      INTO (shkzg1hu , kopbal1hu)
      FROM bsid
     WHERE bukrs = ibukrs
       AND kunnr = ktab-kunnr
       AND budat < idate-low
       AND shkzg = 'H'
       AND umskz IN zspgl
     GROUP BY shkzg.
    ENDSELECT.
    SELECT shkzg SUM( dmbtr )
      INTO (shkzg2s , kopbal2s)
      FROM bsad
     WHERE bukrs = ibukrs
       AND kunnr = ktab-kunnr
       AND budat < idate-low
       AND shkzg = 'S'
       AND umskz EQ ''
     GROUP BY shkzg.
    ENDSELECT.
    SELECT shkzg SUM( dmbtr )
      INTO (shkzg2su , kopbal2su)
      FROM bsad
     WHERE bukrs = ibukrs
       AND kunnr = ktab-kunnr
       AND budat < idate-low
       AND shkzg = 'S'
       AND umskz IN zspgl
     GROUP BY shkzg.
    ENDSELECT.
    SELECT shkzg SUM( dmbtr )
      INTO (shkzg2h , kopbal2h)
      FROM bsad
     WHERE bukrs = ibukrs
       AND kunnr = ktab-kunnr
       AND budat < idate-low
       AND shkzg = 'H'
       AND umskz EQ ''
     GROUP BY shkzg.
    ENDSELECT.
    SELECT shkzg SUM( dmbtr )
      INTO (shkzg2hu , kopbal2hu)
      FROM bsad
     WHERE bukrs = ibukrs
       AND kunnr = ktab-kunnr
       AND budat < idate-low
       AND shkzg = 'H'
       AND umskz IN zspgl
     GROUP BY shkzg.
    ENDSELECT.

>
Siegfried Boes wrote:
> Please stop writing answers if you understrand nothing about database SELECTS!
> All above recommendations are pure nonsense!
>
> As always with such questions, you must do an analysis before you ask! The coding itself is perfectly o.k., a SELECT with an aggregate and a GROUP BY can not be changed into a SELECT SINGLE or whatever.
>
> But your SELECTS mustr be supported by indexes!
>
> Please run SQL Trace, and tell us the results:
>
> I see 8 statements, what is the duration and the number of records coming back for each statement?
> Maybe only one statement is slow.
>
> See
> SQL trace:
> /people/siegfried.boes/blog/2007/09/05/the-sql-trace-st05-150-quick-and-easy
>
>
> Siegfried
Nice point there Siegfried. Instead of giving constructive suggestion, people here give a very bad suggestion on using SELECT SINGLE combined with SUM and GROUP BY.
I hope the person already look at your reply before he try using select single and wondering why he has error.
Anyway, the most important thing is how many loop expected for those select statements?
If you have like thousands of loop, you can expect a poor performance.
So, you should also look at how many times the select statement is called and not only performance for each select statement when you're doing SQL trace.
Regards,
Abraham

Bind Variable in SELECT statement and get the value in PL/SQL block

Hi All,
I would like pass bind variable in SELECT statement and get the value of the column in Dynamic SQL
Please seee below
I want to get the below value
Expected result:
select distinct empno ,pr.dept   from emp pr, dept ps where   ps.dept like '%IT' and pr.empno =100
100, HR
select distinct ename ,pr.dept   from emp pr, dept ps where   ps.dept like '%IT' and pr.empno =100
TEST, HR
select distinct loc ,pr.dept   from emp pr, dept ps where   ps.dept like '%IT' and pr.empno =100
NYC, HR
Using the below block I am getting column names only not the value of the column. I need to pass that value(TEST,NYC..) into l_col_val variable
Please suggest
----- TABLE LIST
CREATE TABLE EMP(
EMPNO NUMBER,
ENAME VARCHAR2(255),
DEPT VARCHAR2(255),
LOC    VARCHAR2(255)
INSERT INTO EMP (EMPNO,ENAME,DEPT,LOC) VALUES (100,'TEST','HR','NYC');
INSERT INTO EMP (EMPNO,ENAME,DEPT,LOC) VALUES (200,'TEST1','IT','NYC');
INSERT INTO EMP (EMPNO,ENAME,DEPT,LOC) VALUES (300,'TEST2','MR','NYC');
INSERT INTO EMP (EMPNO,ENAME,DEPT,LOC) VALUES (400,'TEST3','HR','DTR');
INSERT INTO EMP (EMPNO,ENAME,DEPT,LOC) VALUES (500,'TEST4','HR','DAL');
INSERT INTO EMP (EMPNO,ENAME,DEPT,LOC) VALUES (600,'TEST5','IT','ATL');
INSERT INTO EMP (EMPNO,ENAME,DEPT,LOC) VALUES (700,'TEST6','IT','BOS');
INSERT INTO EMP (EMPNO,ENAME,DEPT,LOC) VALUES (800,'TEST7','HR','NYC');
COMMIT;
CREATE TABLE COLUMNAMES(
COLUMNAME VARCHAR2(255)
INSERT INTO COLUMNAMES(COLUMNAME) VALUES ('EMPNO');
INSERT INTO COLUMNAMES(COLUMNAME) VALUES ('ENAME');
INSERT INTO COLUMNAMES(COLUMNAME) VALUES ('DEPT');
INSERT INTO COLUMNAMES(COLUMNAME) VALUES ('LOC');
COMMIT;
CREATE TABLE DEPT(
DEPT VARCHAR2(255),
DNAME VARCHAR2(255)
INSERT INTO DEPT(DEPT,DNAME) VALUES ('IT','INFORMATION TECH');
INSERT INTO DEPT(DEPT,DNAME) VALUES ('HR','HUMAN RESOURCE');
INSERT INTO DEPT(DEPT,DNAME) VALUES ('MR','MARKETING');
INSERT INTO DEPT(DEPT,DNAME) VALUES ('IT','INFORMATION TECH');
COMMIT;
PL/SQL BLOCK
DECLARE
TYPE EMPCurTyp IS REF CURSOR;
v_EMP_cursor    EMPCurTyp;
l_col_val           EMP.ENAME%type;
l_ENAME_val       EMP.ENAME%type;
l_col_ddl varchar2(4000);
l_col_name varchar2(60);
l_tab_name varchar2(60);
l_empno number ;
b_l_col_name VARCHAR2(255);
b_l_empno NUMBER;
begin
for rec00 in (
select EMPNO aa from EMP
loop
l_empno := rec00.aa;
for rec in (select COLUMNAME as column_name from columnames
loop
l_col_name := rec.column_name;
begin
l_col_val :=null;
   l_col_ddl := 'select distinct :b_l_col_name ,pr.dept ' ||' from emp pr, dept ps where   ps.dept like ''%IT'' '||' and pr.empno =:b_l_empno';
   dbms_output.put_line('DDL ...'||l_col_ddl);
   OPEN v_EMP_cursor FOR l_col_ddl USING l_col_name, l_empno;
LOOP
    l_col_val :=null;
    FETCH v_EMP_cursor INTO l_col_val,l_ename_val;
    EXIT WHEN v_EMP_cursor%NOTFOUND;
      dbms_output.put_line('l_col_name='||l_col_name ||' empno ='||l_empno);
   END LOOP;
CLOSE v_EMP_cursor;
END;
END LOOP;
END LOOP;
END;

user1758353 wrote:
Thanks Billy, Would you be able to suggest any other faster method to load the data into table. Thanks,
As Mark responded - it all depends on the actual data to load, structure and source/origin. On my busiest database, I am loading on average 30,000 rows every second from data in external files.
However, the data structures are just that - structured. Logical.
Having a data structure with 100's of fields (columns in a SQL table), raise all kinds of questions about how sane that structure is, and what impact it will have on a physical data model implementation.
There is a gross misunderstanding by many when it comes to performance and scalability. The prime factor that determines performance is not how well you code, what tools/language you use, the h/w your c ode runs on, or anything like that. The prime factor that determines perform is the design of the data model - as it determines the complexity/ease to use the data model, and the amount of I/O (the slowest of all db operations) needed to effectively use the data model.

Calculation using multiple select statements - APEX 4.0

Hello,
I am new to APEX, PL/SQL and have some SQL knowledge, but I pick up things quickly. I want to make a page item equal to the value of a Select statement minus another Select statement. The statements pull from the same tables and only differ slightly in the where clause. I do not know the best way to create this calculation. Can someone please assist.
Select Statement #1
select     sum(JE_TRANSACTIONS.DEBIT_AMOUNT) as "Release"
from     "REVREC_FORMS" "REVREC_FORMS",
     "JOURNAL_ENTRIES" "JOURNAL_ENTRIES",
     "JE_TRANSACTIONS" "JE_TRANSACTIONS"
where "JOURNAL_ENTRIES"."RELATED_REVREC"="REVREC_FORMS"."REVREC_ID"
and     "JOURNAL_ENTRIES"."RECORD_ID_"="JE_TRANSACTIONS"."RELATED_JOURNAL_ENTRY"
and      "JOURNAL_ENTRIES"."RELEASE_TYPE" ='Release'
and     "JOURNAL_ENTRIES"."REVENUE_TYPE" ='Software'
and     "REVREC_FORMS"."REVREC_ID" =:P12_REVREC_ID
Select Statement #2
select     sum(JE_TRANSACTIONS.DEBIT_AMOUNT) as "Deferral"
from     "REVREC_FORMS" "REVREC_FORMS",
     "JOURNAL_ENTRIES" "JOURNAL_ENTRIES",
     "JE_TRANSACTIONS" "JE_TRANSACTIONS"
where "JOURNAL_ENTRIES"."RELATED_REVREC"="REVREC_FORMS"."REVREC_ID"
and     "JOURNAL_ENTRIES"."RECORD_ID_"="JE_TRANSACTIONS"."RELATED_JOURNAL_ENTRY"
and      "JOURNAL_ENTRIES"."RELEASE_TYPE" ='Deferral'
and     "JOURNAL_ENTRIES"."REVENUE_TYPE" ='Software'
and     "REVREC_FORMS"."REVREC_ID" =:P12_REVREC_ID

How about
select   sum(decode(release_type,'Deferral',je_transactions.debit_amount)) - sum(decode(release_type,'Release',je_transactions.debit_amount)) as result
from   "REVREC_FORMS" "REVREC_FORMS",
"JOURNAL_ENTRIES" "JOURNAL_ENTRIES",
"JE_TRANSACTIONS" "JE_TRANSACTIONS"
where "JOURNAL_ENTRIES"."RELATED_REVREC"="REVREC_FORMS"."REVREC_ID"
and "JOURNAL_ENTRIES"."RECORD_ID_"="JE_TRANSACTIONS"."RELATED_JOURNAL_ENTRY"
and "JOURNAL_ENTRIES"."REVENUE_TYPE" ='Software'
and "REVREC_FORMS"."REVREC_ID" =:P12_REVREC_IDScott

Increase performance of the following SELECT statement.

Hi All,
I have the following select statement which I would want to fine tune.
CHECK NOT LT_MARC IS INITIAL.
SELECT RSNUM
         RSPOS
         RSART
         MATNR
         WERKS
         BDTER
         BDMNG FROM RESB
                      INTO TABLE GT_RESB
                      FOR ALL ENTRIES IN LT_MARC
                      WHERE XLOEK EQ ' '
                      AND MATNR EQ LT_MARC-MATNR
                      AND WERKS EQ P_WERKS
                      AND BDTER IN S_PERIOD.
The following query is being run for a period of 1 year where the number of records returned will be approx 3 million. When the program is run in background the execution time is around 76 hours. When I run the same program dividing the selection period into smaller parts I am able to execute the same in about an hour.
After a previous posting I had changed the select statement to
CHECK NOT LT_MARC IS INITIAL.
SELECT RSNUM
         RSPOS
         RSART
         MATNR
         WERKS
         BDTER
         BDMNG FROM RESB
                      APPENDING TABLE GT_RESB PACKAGE SIZE LV_SIZE
                      FOR ALL ENTRIES IN LT_MARC
                      WHERE XLOEK EQ ' '
                      AND MATNR EQ LT_MARC-MATNR
                      AND WERKS EQ P_WERKS
                      AND BDTER IN S_PERIOD.
ENDSELECT.
But the performance improvement is very negligible.
Please suggest.
Regards,
Karthik

Hi Karthik,
<b>Do not use the appending statement</b>
Also you said if you reduce period then you get it quickly.
Why not try dividing your internal table LT_MARC into small internal tables having max 1000 entries.
You can read from index 1 - 1000 for first table. Use that in the select query and append the results
Then you can refresh that table and read table LT_MARC from 1001-2000 into the same table and then again execute the same query.
I know this sounds strange but you can bargain for better performance by increasing data base hits in this case.
Try this and let me know.
Regards
Nishant
> I have the following select statement which I would
> want to fine tune.
>
>   CHECK NOT LT_MARC IS INITIAL.
> SELECT RSNUM
>          RSPOS
> RSART
>          MATNR
> WERKS
>          BDTER
> BDMNG FROM RESB
>                       INTO TABLE GT_RESB
> FOR ALL ENTRIES IN LT_MARC
>                       WHERE XLOEK EQ ' '
> AND MATNR EQ LT_MARC-MATNR
>                       AND WERKS EQ P_WERKS
> AND BDTER IN S_PERIOD.
>
> e following query is being run for a period of 1 year
> where the number of records returned will be approx 3
> million. When the program is run in background the
> execution time is around 76 hours. When I run the
> same program dividing the selection period into
> smaller parts I am able to execute the same in about
> an hour.
>
> After a previous posting I had changed the select
> statement to
>
>   CHECK NOT LT_MARC IS INITIAL.
> SELECT RSNUM
>          RSPOS
> RSART
>          MATNR
> WERKS
>          BDTER
> BDMNG FROM RESB
> APPENDING TABLE GT_RESB
>   PACKAGE SIZE LV_SIZE
>                     FOR ALL ENTRIES IN LT_MARC
>   WHERE XLOEK EQ ' '
>                     AND MATNR EQ LT_MARC-MATNR
>   AND WERKS EQ P_WERKS
>                     AND BDTER IN S_PERIOD.
> the performance improvement is very negligible.
> Please suggest.
>
> Regards,
> Karthik
Hi Karthik,

Intersection in Select statement

Hi,
Do any one know about some intersection option in select statement.
My case is : I have 2 database tables say TAB1 and TAB2 . TAB1 has data (A, B, C, D) and TAB2 has data (B, D) now I want the output as (A and C) after joining these 2 tables and selecting.
That is I want the values of Table1 which are not there in Table2.
I have the option of selecting Table1 and then for all entries fetch Table2, then Loop at the Table & delete if record exists.
But this is creating performance issue as the number of records in both tables are in Lakhs.
So I wanted to know is there any option like Left Intersecion or some thing like left outer join and all, so that I can pick the dat in one select.
Thanks,
Sameer

Issue solved :
Sample Code
TYPES : BEGIN OF X_VBAK,
VBELN TYPE VBAK-VBELN,
AUBEL TYPE VBRP-AUBEL.
TYPES : END OF X_VBAK.
DATA : I_VBAK TYPE STANDARD TABLE OF X_VBAK.
DATA : I_VBAS TYPE STANDARD TABLE OF X_VBAK.
SELECT AVBELN BAUBEL INTO CORRESPONDING FIELDS OF TABLE I_VBAK FROM ( VBAK AS A
LEFT OUTER JOIN VBRP AS B ON AVBELN EQ BAUBEL ).
SORT I_VBAK BY VBELN.
delete ADJACENT DUPLICATES FROM i_vbak COMPARING ALL FIELDS.
DELETE I_VBAK WHERE AUBEL NE ''.
SORT I_VBAK BY VBELN.
SORT I_VBAS BY VBELN.

Regarding Logical database and select statement..

Hi
Experts.
i would like to know the diff b/w logical data base & select statement while using report.
wt is the use of logical databases in R/3. is there   any   advantage used in the reports.
Thanks & Regards..
Spandana.

Dear Spandana,
Go through the below description of LDB. I hope you wil get a fair amount of idea.
SAP comes loaded with all the extras. Among the extras that are most helpful to IT managers are all the access routines needed to pull any business object that managers can think of out of SAP databases. However, SAP has not thought of everything where your particular applications are concerned. SAP organizes its standard database tables to service business units based on conventional business applications. Itu2019s likely your business requires something new, perhaps even something exotic. In that case, you will need to create a new database, using information from different places. Basically, you need a logical database. You need to create a virtual business data object repository consisting of a new kind of record or table that suits your purposes. In addition, the repository should be composed of information that is actually stored in a number of different locations, none of them necessarily logically associated with one another. Letu2019s take a closer look at creating logical databases.
A case for a logical database
Suppose my company manufactures widgets of the most obscure variety, and they are components of other widgets. I sell my widgets as raw material for the more sophisticated widgets built by others, but in some cases I actually partner with other manufacturers in creating yet another class of widget. Now, in my world, I consequently have customers who are also partners. I sell to them and I partner with them in manufacturing and distribution. Also, I need an application that uses both of these dual-use relationships.
Essentially, I have a customer database and a partner database. Neither contains records that are structured to contain the identifying particulars of the other. Thus, I need a hybrid database that gives me tables detailing these hybrid relationships. What can I do? I can go the long way around and write a new database, pulling information from both and creating new objects with a customized program that I write by hand. However, this process is cumbersome and contains maintenance issues. On the other hand, I can use SAPu2019s logical database facility, create my logical database in a couple of minutes, and have no maintenance issues at all.
Logical database structures
There are three defining entities in an SAP logical database. You must be clear on all three in order to create and use one.
u2022     Table structure: Your logical database includes data from specified tables in SAP. There is a hierarchy among these tables defined by their foreign keys (all known to SAP), and you are going to define a customized relationship between select tables. This structure is unique and must be defined and saved.
u2022     Data selection: You may not want or need every item in the referenced tables that contributes to your customized database. There is a selection screen that permits you to pick and choose.
u2022     Database access programming: Once youu2019ve defined your logical database, SAP will generate the access subroutines needed to pull the data in the way you want it pulled.
Creating your own logical database
ABAP/4 (Advanced Business Application Programming language, version 4) is the language created by SAP for implementation and customization of its R/3 system. ABAP/4 comes loaded with many predefined logical databases that can construct and table just about any conventional business objects you might need in any canned SAP application. However, you can also create your own logical databases to construct any custom objects you care to define, as your application requires in ABAP/4. Hereu2019s a step-by-step guide:
1.     Call up transaction SLDB (or transaction SE36). The path you want is Tools | ABAP Workbench | Development | Programming Environment | Logical Databases. This screen is called Logical Database Builder.
2.     Enter an appropriate name in the logical database name field. You have three options on this screen: Create, Display, and Change. Choose Create.
3.     Youu2019ll be prompted for a short text description of your new logical database. Enter one. Youu2019ll then be prompted to specify a development class.
4.     Now comes the fun part! You must specify a root node, or a parent table, as the basis of your logical database structure. You can now place subsequent tables under the root table as needed to assemble the data object you want. You can access this tree from this point forward, to add additional tables, by selecting that root node and following the path Edit | Node | Create. Once youu2019ve saved the structure you define in this step, the system will generate the programming necessary to access your logical database. The best part is you donu2019t have to write a single line of code.
Watch out!
The use of very large tables will degrade the performance of a logical database, so be aware of that trade-off. Remember that some tables in SAP are very complex, so they will be problematic in any user-defined logical database.
Declaring a logical database
Hereu2019s another surprising feature of logical databases: You do not assign them in your ABAP/4 Code. Instead, the system requires that you specify logical databases as attributes. So when you are creating a report, have your logical database identifier (the name you gave it) on hand when you are defining its attributes on the Program Attributes screen. The Attributes section of the screen (the lower half) will include a Logical database field, where you can declare your logical database.
Logical databases for increasing efficiency
Why else would you want to create a logical database? Consider that the logical databases already available to you begin with a root node and proceed downward from there. If the data object you wish to construct consists of items that are all below the root node, you can use an existing logical database program to extract the data, then trim away what you donu2019t want using SELECT statementsu2014or you can increase the speed of the logical database program considerably by redefining the logical database for your object and starting with a table down in the chain. Either way, youu2019ll eliminate a great deal of overhead.
Regards
Arindam

JDBC Sender MSSQL Stored Procedure - Multiple Select Statements

Hello all,
I will proceed to tell you my problem, for which solution I request your kind advice:
Im working in a project for a retailer, which consists in sending the information from erp and sql server to pos thru XI interfaces.
One of the interfaces is about sending items from sql server to a file so the pos can load it into the system. For doing so I have devloped an stored procedure which function is to return several select statements as many stores the retailer might have, so they can have a different file per store along with its corresponding items in it.
The thing is that XI just gets the first select statement and creates the corresponding file, but it seems to ignore the remaining responses as I'm neither getting any file nor an error afterwards.
So, my question is: is XI capable of handling multiple select responses from an Stored Procedure in graphical mapping??? Or am I just wasting my time trying?
Thanks in advice for your help.
Regards.

Hello Ramkumar,
After 5 days trying, I finally made it work out applying your advice. Below the short explanation of what I did:
My Source structure is: Main Node->Row->Records (Material Number, StoreNum, Price, Status)
My Target structure is: Main Node->File Node->Record Node->Records ( Material Number, Price, Status)
The key was to make all the occurrences happen against StoreNum node. So, based on what you adviced these two where the key mappings:
1) The Mapping that will create a new file for each different store that comes in the query (In my case, query was already sort by store using an sql "order by" function, if not you can also use xi node function "sort" as Ramkumar suggested)
StoreNum->RemoveContext->SplitbyValue (Value Changed)->Collapse Contexts->File Node
2) The Mapping that will create each record in its corresponding store file:
StoreNum->RemoveContext->SplitbyValue (Value Changed)->Record Node
And Voilá !!! It worked.
Thanks very much Ramkumar.
Regards.

About SELECT statement

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