Using a variable to vary the WHERE clause in a statement

I have an int column that has values >= 0.
Depending on a variable I want to select all the rows of the table or only the rows where the int column is 0.
How do I do this?
Your help would be much appreciated.
Thanking you in anticipation.
Roger
rogerwithnell

Please post DDL, so that people do not have to guess what the keys, constraints, Declarative Referential Integrity, data types, etc. in your schema are. Learn how to follow ISO-11179 data element naming conventions and formatting rules. Temporal data should
use ISO-8601 formats. Code should be in Standard SQL as much as possible and not local dialect.
This is minimal polite behavior on SQL forums. Why do you think "a variable" and "the integer column" are precise clear specs? I hate to tell you but zero is a integer.
--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
in Sets / Trees and Hierarchies in SQL

Similar Messages

UPDATE using a second table for the Where Clause

Hi There,
Hoep someone can help me!
I am attempting to update a field in Tbl.1 to a known value. However, i want to use another table to specify WHICH records to update.
in this case i want to use table early_provider to obtain the value 'HCR' then pass that to the UPDATE clause in order to SET early_provisions.type_name = 'HOMC'
I hope this makes sense.
UPDATE EARLY_PROVISIONS eps
SET TYPE_NAME = (SELECT *
FROM EARLY_PROVIDER ep
WHERE PROVIDER_TYPE = 'HCR'
WHERE EP.PROVIDER_ID = EPS.PROVIDER_ID);
I need to be able to include the field value 'HOMC in this statement but am not sure how, or if i am barking up the wrong tree.
Much appreciated in advance
PFG

PFGMcAvoy wrote:
Karthick_Arp
Thanks. this seems to only update 15 rows of which already exist in the table early_provisions and filed type_name!
I should be selecting about 200 recordsd from early_provider that have the provider_type = 'HCR'
??I don't know your data. So i cant answer that. But for what you asked i think thats the correct UPDATE statement. So i think you have to investigate your data to find what is going on.

How to use multiple search conditions in the where clause

Hi,
Below is my query
/****** Script for SelectTopNRows command from SSMS ******/
SELECT distinct
ctacct,sum(GLMN02)
FROM [ODS].[Staging].[tODS_INF_GLPCT]
inner join
[ODS].[Staging].[tODS_INF_GLPGL] ON tODS_INF_GLPCT.CTPAGE = tODS_INF_GLPGL.GLPAGE
where
CTACCT like '[0-9][0-9][0-9]-[0-9][0-9][0-9]-63020-4110%'
This one gives me the exact result i want, now if i add one more to my where clause like this
/****** Script for SelectTopNRows command from SSMS ******/
SELECT distinct
ctacct,sum(GLMN02)
--,ctdesc,CTPAGE
--SUM(GLMN02)
FROM [ODS].[Staging].[tODS_INF_GLPCT]
inner join
[ODS].[Staging].[tODS_INF_GLPGL] ON tODS_INF_GLPCT.CTPAGE = tODS_INF_GLPGL.GLPAGE
where
CTACCT like'[0-9][0-9][0-9]-[0-9][0-9][0-9]-63020-4110%' or
CTACCT like '[0-9][0-9][0-9]-[0-9][0-9][0-9]-63020-4115%'
This query doesnt give me the exact values instead it gives me all the weird values.Can someone please help me with how to work on this where clause?
Thanks

Hi Patrick,
This is what i ve tried earlier and it isnt working .If i use the first query
/****** Script for SelectTopNRows command from SSMS ******/
SELECT distinct
ctdesc,SUM(GLMN02)
--,ctdesc,CTPAGE
--SUM(GLMN02)
FROM [ODS].[Staging].[tODS_INF_GLPCT]
inner join
[ODS].[Staging].[tODS_INF_GLPGL] ON tODS_INF_GLPCT.CTPAGE = tODS_INF_GLPGL.GLPAGE
where
CTAcct LIKE '[0-9][0-9][0-9]-[0-9][0-9][0-9]-63020-4110%'
--OR
--CTAcct LIKE '[0-9][0-9][0-9]-[0-9][0-9][0-9]-63020-4115%'
and GLYEAR = 2014
and CTDESC = 'Sales'
group by ctdesc
The result set is
Sales
-182273.96
And if i use the second query
SELECT distinct
ctdesc,SUM(GLMN02)
--,ctdesc,CTPAGE
--SUM(GLMN02)
FROM [ODS].[Staging].[tODS_INF_GLPCT]
inner join
[ODS].[Staging].[tODS_INF_GLPGL] ON tODS_INF_GLPCT.CTPAGE = tODS_INF_GLPGL.GLPAGE
where
CTAcct LIKE '[0-9][0-9][0-9]-[0-9][0-9][0-9]-63020-4110%'
OR
CTAcct LIKE '[0-9][0-9][0-9]-[0-9][0-9][0-9]-63020-4115%'
and GLYEAR = 2014
and CTDESC = 'Sales'
group by ctdesc
The result set i get is
Sales
-1455441.08
And i verified that CTAcct LIKE '[0-9][0-9][0-9]-[0-9][0-9][0-9]-63020-4115%'
this second line of where clause has not desc as Sales.
I am not sure whats causing the difference in the values.
Can you please help me with this?
Thanks

Should I use And or OR in the Where Clause?

2 Databases have been merged, and in the purge some data was omitted, so I am running clean-up. Now I need a query to show me if item1 is null, then check olditem1 if both fields are null then ignore the record completely. But If either field
has a value I need it returned. So 1st check item1 if that field is not null, then return the record, if item1 is null, check olditem1 if that field is not null then return the record. If both fileds are null, ignore the record and let's check
the next one.
Sample Data;
Select
Test.StaffIDID,
Test.purchasedfrom,
Test.date,
case when Test.item1 is null then Test.olditem1 else null end as [1st Item],
case when Test.item2 is null then Test.olditem2 else null end as [2nd Item],
From internetsales Test
CREATE TABLE Test
StaffID INT NOT NULL PRIMARY KEY,
purchasedfrom NVARCHAR(30) NOT NULL,
date DateTime NOT NULL,
item1 NVARCHAR(50),
item2 NVARCHAR(50),
olditem1 NVARCHAR(50),
olditem2 NVARCHAR(50)
INSERT Test VALUES
(2, 'web1', '2010-01-02', 'stereo', 'NULL', 'NULL', 'NULL'),
(3, 'web3', '2011-02-15', 'NULL', 'microphone', 'NULL', 'NULL'),
(4, 'web14', '2014-02-21', 'NULL', 'NULL', 'NULL', 'headset'),
(5, 'web81', '2015-01-01', 'NULL', 'NULL', 'MP3 Player', 'NULL');
(6, 'web18', '2011-01-01', 'Dryer', 'NULL', 'MP3 Player', 'NULL');
(7, 'web8', '2009-01-01', 'NULL', 'NULL', 'Stove', ''NULL);
(8, 'web828', '2002-01-01', 'NULL', 'NULL', 'NULL', 'USB HUB');
(9, 'web88', '2007-01-01', 'Refrigerator', 'NULL', 'NULL', 'NULL');
(10, 'web89', '2009-01-01', 'NULL', 'NULL', 'NULL', 'NULL');
Desired returned result sets would be StaffIDs: 2,5,6,7,9 -- as they have a value for item1 or olditem1

Looks like you totally ignored my answer :-(
well... you have your reason probably...
You do realize that I gave you the answer from the start?!?
Hi,
your sample data do not include any NULL value. Blank string is not NULL.
Please clarify your question and give us the result that you want to get, according to your sample data.
* if your data is NULL and not empty string that you can use COALESCE(item1, olditem1,'') in order to get the first value that is not NULL. if both
NULL then it will return blank string as this is the first value that is not null
Ronen Ariely
[Personal Site] [Blog] [Facebook]
Using nested IIF can be done directly with the
COALESCE function.
The execution plan is the same, but the code is much cleaner and easier to write or read.
There is a reason for this function.
* In your current needs there are only 2 nested IIF, but you should know about COALESCE function! Once you get more complex situation you will be able to get a solution much faster and probably without any mistake on the first try.
try to use 5 nested IIF... using COALESCE this is simple as 2 or 10... all you need is to write all the values and the function will return the first that is not NULL
Any way, I hope this is useful for people that will come to this thread in future :-)
-- SOLUTION 1: using nested IIF
SELECT StaffID, purchasedfrom, date,
IIF(ITEM1 IS NOT NULL, ITEM1, IIF(OLDITEM1 IS NOT NULL, OLDITEM1,NULL)) AS [1ST ITEM],
IIF(ITEM2 IS NOT NULL, ITEM2,IIF(OLDITEM2 IS NOT NULL, OLDITEM2,NULL)) AS [2ND ITEM]
FROM Test
-- solution 2: using COALESCE
SELECT
StaffID, purchasedfrom, date,
COALESCE(ITEM1, OLDITEM1) AS [1ST ITEM],
COALESCE(ITEM2, OLDITEM2) AS [2ND ITEM]
FROM Test
-- Whish solution look simpler to read, write or use?
-- The execution plan is the same, but it is always good idea to make sure if you are not sure :-)
I hope this is useful :-)
Ronen Ariely
[Personal Site] [Blog] [Facebook]

Forcing Index use with UPPER or LOWER in the WHERE clause.

Does anyone know how to force Oracle to use an index/Key when using UPPER or LOWER in the WHERE clause?

You have to create a function index. Check your documentation on it.

WHERE clause in SELECT statement

hi experts..
i want to give 'OR' condition in the 'where' clause of 'SELECT' statement.
is it possible?
for examlpe..
IF EXIDV2 IS NOT INITIAL.
   SELECT * FROM YSDT_SHIPLOAD
            INTO TABLE IG_SHIPLOAD
            WHERE EXIDV2 = EXIDV2 AND
                         VHILM = PC1 OR PC2 OR PC3.
ENDIF.
i want that VHILM should be one of those three.
how can i do this?
thanks..

Hi ,
its possible,
Select * from ysdt_shipload int table ig_shipload where exidv2 = exidv2
                                                                        AND vhilm = pc1
                                                                        OR     vhilm = pc2
                                                                         OR   vhilm = pc3.
OR
Select * from ysdt_shipload int table ig_shipload where exidv2 = exidv2
                    AND (vhilm = pc1 or vhilm = pc2 or vhilm = pc3).
Regards
Arani Bhaskar
Edited by: arani bhaskar on Mar 16, 2009 5:14 PM

Using if logic in the where clause of a select statement

I have a select clause. And in the select clause there is a variable all_off_trt that can be 'Y' or 'N'.
In the where clause I want to make it so that if a form variable is checked and all_off_trt is 'Y' then
exclude it else if the form variable isn't checked then select it no matter what all_off_trt is.
Is there any way to include either and if statement or a case statement within the where clause to acheive this? If not is there another way of doing it?
Basically I am looking for a case statement like this
case
when all_off_trt = 'Y' and mail_para.code = 'Y' then false
else true
end
Message was edited by:
Tugnutt7

Ok, so that really doesn't solve my problem. I have 3 different fields that I need to do that with. Each combining in a select statement to print an email list, as well as other thing limiting the where clause.
This is currently what I have, tested and working 100%.
cursor email_cur is
select unique p.email,s.all_off_trt,s.all_deceased,s.no_enroll
from participant p, trialcom t, ethics s
where p.status='A'
and p.surname=t.surname
and p.initials=t.initials
and s.trial_cd = t.tricom
and s.centre = t.centre
and p.email is not null
and (t.centre in (select code from mail_parameters where user_name=user and mail_para='CENTRE')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='CENTRE'))
and (t.tricom in (select code from mail_parameters where user_name=user and mail_para='TRIAL')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='TRIAL'))
and (t.role in (select code from mail_parameters where user_name=user and mail_para='ROLE')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='ROLE'))
and (p.country in (select code from mail_parameters where user_name=user and mail_para='COUNTRY')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='COUNTRY'))
and (t.represent in (select code from mail_parameters where user_name=user and mail_para='REPRESENT')
or 'XX' in (select code from mail_parameters where user_name=user and mail_para='REPRESENT'));
This is in a program unit that runs when a button is clicked. At the end of that I need to add on the 3 case statements that help further narrow down the selection of emails to be printed. Then it prints the emails selected from this statement into a file. So it has to be done right in the select statement. The three table variables are the all_off_trt, all_deceased, and no_enroll. The form has 3 checkboxes. One for each, that when checked (giving the variable associated with the checkboxes a value of 'Y') excludes all emails that have a 'Y' in the coresponding table variable.

Trouble using a function in the where clause

Hello,
I am using a function found at ask.tom.oracle.com which converts a long data type to a character. The function is returning an error when it is placed in the where clause. The sql statement , error message and the function from ask tom are shown below. Does anyone know how to fix this?
<pre>
SELECT A.FLDPHYSICAL,
A.FLDEXPOSURE,
A.FLDDATEDUE,
A.FLDDATELAST,
A.FLDEMPLOYEE,
B.FLDBDATE,
B.FLDMAILSTOP,
B.FLDREC_NUM,
B.FLDLNAME,
B.FLDMI,
B.FLDFNAME,
B.FLDBDATE,
B.FLDDEPT,
B.FLDSTATUS,
B.FLDSSN,
B.FLDHOMEPHON,
B.FLDWORKPHON,
B.FLDID,
B.FLDDIVISION
FROM REQEXAM A,
EMPLOYEE B,
EMPLOYEE_MEMO C
WHERE A.FLDEMPLOYEE = B.FLDREC_NUM
AND b.flduserstr = c.fldrec_num
AND OHM_PKG.GET_LONG('EMPLOYEE_MEMO', 'FLDDATA', C.ROWID) LIKE '%CDL YES%'
AND A.FLDDATEDUE > '01/01/1900'
AND A.FLDPHYSICAL ='CDP'
ORDER BY B.FLDDIVISION,
B.FLDLNAME,
B.FLDFNAME,
B.FLDMI,
A.FLDDATEDUE
The error message
Error at Command Line:26 Column:4
Error report:
SQL Error: ORA-00904: "OHM_PKG"."GET_LONG": invalid identifier
00904. 00000 - "%s: invalid identifier"
create or replace
PACKAGE OHM_PKG AS
/* TODO enter package declarations (types, exceptions, methods etc) here */
function getlong( p_tname in varchar2,p_cname in varchar2,p_rowid in rowid ) return varchar2;
END OHM_PKG;
create or replace
PACKAGE BODY OHM_PKG AS
function getlong( p_tname in varchar2,p_cname in varchar2,p_rowid in rowid ) return varchar2 as
l_cursor integer default dbms_sql.open_cursor;
l_n number;
l_long_val varchar2(4000);
l_long_len number;
l_buflen number := 4000;
l_curpos number := 0;
begin
dbms_sql.parse( l_cursor,
'select ' || p_cname || ' from ' || p_tname ||
' where rowid = :x',
dbms_sql.native );
dbms_sql.bind_variable( l_cursor, ':x', p_rowid );
dbms_sql.define_column_long(l_cursor, 1);
l_n := dbms_sql.execute(l_cursor);
if (dbms_sql.fetch_rows(l_cursor)>0)
then
dbms_sql.column_value_long(l_cursor, 1, l_buflen, l_curpos ,
l_long_val, l_long_len );
end if;
dbms_sql.close_cursor(l_cursor);
return l_long_val;
end getlong;
END OHM_PKG;
</prev>

Remove the '_' from the function's name as below:
AND OHM_PKG.GETLONG('EMPLOYEE_MEMO', 'FLDDATA', C.ROWID) LIKE '%CDL YES%'

Query Tuning - using CASE statement in the WHERE clause

Hi All,
My query has been modified to use a CASE statement in the WHERE clause to consider data from certain columns based on a parameter value. This modified query is doing a full table scan and running endlessly. Please suggest what may be done to improve its performance:
Query:
SELECT LAST_DAY(TRUNC(TO_TIMESTAMP(os.requestdatetime, 'yyyymmddhh24:mi:ss.ff4'))) AS summary_date,
os.acctnum,
os.avieworigin_refid,
COUNT(1) cnt_articleview,
SUM(NVL(autocompletedterm,0)) cnt_autocompletedterm
FROM TABLE1 os
WHERE os.acctnum IS NOT NULL
AND os.avieworigin_refid IS NOT NULL
AND os.requestdatetime IS NOT NULL
AND UPPER(os.success_ind) = 'S'
AND CASE WHEN
Param_ValueToCheck = 'FULL' AND get_date_timestamp(os.requestdatetime) BETWEEN
TO_DATE('01-MAY-2011 00:00:00','DD-MON-YYYY HH24:MI:SS') AND
TO_DATE('31-MAY-2011 00:00:00','DD-MON-YYYY HH24:MI:SS')
THEN 1
WHEN
Param_ValueToCheck = 'INCR' AND os.entry_createddate BETWEEN
TO_DATE('01-MAY-2011 00:00:00','DD-MON-YYYY HH24:MI:SS') AND
TO_DATE('31-MAY-2011 00:00:00','DD-MON-YYYY HH24:MI:SS')
THEN 1
END = 1
AND CASE WHEN
Param_ValueToCheck = 'FULL' AND os.entry_CreatedDate BETWEEN
TO_DATE('01-APR-2011 00:00:00','DD-MON-YYYY HH24:MI:SS') AND
TO_DATE('07-JUN-2011 00:00:00','DD-MON-YYYY HH24:MI:SS')
THEN 1
WHEN
Param_ValueToCheck = 'INCR' THEN 1
END = 1
GROUP BY LAST_DAY(TRUNC(TO_TIMESTAMP(os.requestdatetime, 'yyyymmddhh24:mi:ss.ff4'))), os.acctnum,os.avieworigin_refid;Table Description:
(Number of rows : approx > 600,000,000)
Name                           Null     Type
ARTICLEID                      NOT NULL NUMBER(20)
USERKEY                                 NUMBER(10)
AVIEWORIGIN_REFID                       VARCHAR2(10)
SUCCESS_IND                             VARCHAR2(2)
ENTRY_CREATEDDATE                       DATE
CREATED_BY                              VARCHAR2(10)
FILENUMBER                              NUMBER(10)
LINENUMBER                              NUMBER(10)
ACCTNUM                                 VARCHAR2(10)
AUTOCOMPLETEDTERM                       NUMBER(2)
REQUESTDATETIME                         VARCHAR2(19)Explain Plan
SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT
Plan hash value: 2224314832
| Id | Operation            | Name              | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop |
|   0 | SELECT STATEMENT     |                   |   590 | 33040 | 2501K (1)| 08:20:15 |       |       |
|   1 | HASH GROUP BY       |                   |   590 | 33040 | 2501K (1)| 08:20:15 |       |       |
|   2 |   PARTITION RANGE ALL|                   |   590 | 33040 | 2501K (1)| 08:20:15 |     1 |1048575|
|* 3 |    TABLE ACCESS FULL | TABLE1 |   590 | 33040 | 2501K (1)| 08:20:15 |     1 |1048575|
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
   3 - filter(UPPER("OS"."SUCCESS_IND")='S' AND CASE WHEN ('FULL'='FULL' AND
              "OS"."ENTRY_CREATEDDATE">=TO_DATE(' 2011-04-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
              "OS"."ENTRY_CREATEDDATE"<=TO_DATE(' 2011-06-07 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) THEN 1 WHEN
              'FULL'='INCR' THEN 1 END =1 AND "OS"."REQUESTDATETIME" IS NOT NULL AND CASE WHEN ('FULL'='FULL'
              AND "ODS"."GET_DATE_TIMESTAMP"("REQUESTDATETIME")>=TO_DATE(' 2011-05-01 00:00:00', 'syyyy-mm-dd
              hh24:mi:ss') AND "ODS"."GET_DATE_TIMESTAMP"("REQUESTDATETIME")<=TO_DATE(' 2011-05-31 00:00:00',
              'syyyy-mm-dd hh24:mi:ss')) THEN 1 WHEN ('FULL'='INCR' AND "OS"."ENTRY_CREATEDDATE">=TO_DATE('
              2011-05-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND "OS"."ENTRY_CREATEDDATE"<=TO_DATE('
PLAN_TABLE_OUTPUT
              2011-05-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) THEN 1 END =1 AND "OS"."ACCTNUM" IS NOT NULL AND
              "OS"."AVIEWORIGIN_REFID" IS NOT NULL)Edited by: Chaitanya on Jun 9, 2011 2:44 AM
Edited by: Chaitanya on Jun 9, 2011 2:47 AM

Hi Dom,
Modified Query:
SELECT LAST_DAY(TRUNC(TO_TIMESTAMP(os.requestdatetime, 'yyyymmddhh24:mi:ss.ff4'))) AS summary_date,
os.acctnum,
os.avieworigin_refid,
COUNT(1) cnt_articleview,
SUM(NVL(autocompletedterm,0)) cnt_autocompletedterm
FROM TABLE1 os
WHERE os.acctnum IS NOT NULL
AND os.avieworigin_refid IS NOT NULL
AND os.requestdatetime IS NOT NULL
AND UPPER(os.success_ind) = 'S'
AND (('FULL' = 'FULL'
AND (get_date_timestamp(os.requestdatetime) BETWEEN TO_DATE('01-MAY-2011 00:00:00','DD-MON-YYYY HH24:MI:SS')
               AND TO_DATE('31-MAY-2011 00:00:00','DD-MON-YYYY HH24:MI:SS')
AND   os.entry_CreatedDate BETWEEN TO_DATE('01-APR-2011 00:00:00','DD-MON-YYYY HH24:MI:SS')
               AND TO_DATE('07-JUN-2011 00:00:00','DD-MON-YYYY HH24:MI:SS')
OR ('FULL' = 'INCR'
AND os.entry_createddate BETWEEN TO_DATE('01-MAY-2011 00:00:00','DD-MON-YYYY HH24:MI:SS')
               AND TO_DATE('31-MAY-2011 00:00:00','DD-MON-YYYY HH24:MI:SS') ))
GROUP BY LAST_DAY(TRUNC(TO_TIMESTAMP(os.requestdatetime, 'yyyymmddhh24:mi:ss.ff4'))), os.acctnum,os.avieworigin_refid;Execute Plan:
PLAN_TABLE_OUTPUT
Plan hash value: 3615447714
| Id | Operation                 | Name              | Rows | Bytes |TempSpc| Cost (%CPU)| Time     | Pstart| Pstop |
|   0 | SELECT STATEMENT          |                   | 25125 | 1374K|       |   407K (1)| 01:21:36 |       |       |
|   1 | HASH GROUP BY            |                   | 25125 | 1374K| 3768K|   407K (1)| 01:21:36 |       |       |
|   2 |   PARTITION RANGE ITERATOR|                   | 25125 | 1374K|       |   407K (1)| 01:21:32 |    29 |    31 |
|* 3 |    TABLE ACCESS FULL      | TABLE1 | 25125 | 1374K|       |   407K (1)| 01:21:32 |    29 |    31 |
PLAN_TABLE_OUTPUT
Predicate Information (identified by operation id):
   3 - filter("OS"."ENTRY_CREATEDDATE">=TO_DATE(' 2011-04-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
              UPPER("OS"."SUCCESS_IND")='S' AND "OS"."REQUESTDATETIME" IS NOT NULL AND
              "ODS"."GET_DATE_TIMESTAMP"("REQUESTDATETIME")>=TO_DATE(' 2011-05-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
              "ODS"."GET_DATE_TIMESTAMP"("REQUESTDATETIME")<=TO_DATE(' 2011-05-31 00:00:00', 'syyyy-mm-dd hh24:mi:ss') AND
              "OS"."ACCTNUM" IS NOT NULL AND "OS"."AVIEWORIGIN_REFID" IS NOT NULL AND "OS"."ENTRY_CREATEDDATE"<=TO_DATE('
              2011-06-07 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))Edited by: Chaitanya on Jun 9, 2011 4:51 AM

Can I use SYSDATE in the WHERE clause to limit the date range of a query

Hi,
Basicaly the subject title(Can I use SYSDATE in the WHERE clause to limit the date range of a query) is my question.
Is this possible and if it is how can I use it. Do I need to join the table to DUAL?
Thanks in advance.
Stelios

As previous poster said, no data is null value, no value. If you want something, you have nvl function to replace null value by an other more significative value in your query.<br>
<br>
Nicolas.

Query Tuning - using CASE statement in the WHERE clause - Duplicate Post

Duplicate Post by mistake.
Please check
Query Tuning - using CASE statement in the WHERE clause
Edited by: Chaitanya on Jun 9, 2011 2:45 AM
Edited by: Chaitanya on Jun 9, 2011 2:46 AM

Duplicate Post by mistake.
Please check
Query Tuning - using CASE statement in the WHERE clause
Edited by: Chaitanya on Jun 9, 2011 2:45 AM
Edited by: Chaitanya on Jun 9, 2011 2:46 AM

Function-based index with OR in the wher-clause

We have some problems with functin-based indexes and
the or-condition in a where-clause.
--We use Oracle 8i (8.1.7)
create table TPERSON(ID number(10),NAME varchar2(20),...);
create index I_NORMAL_TPERSON_NAME on TPERSON(NAME);
create index I_FUNCTION_TPERSON_NAME on TPERSON(UPPER(NAME));
The following two statements run very fast on a large table
and the execution-plan asure the usage of the indexes
(-while the session is appropriate configured and the table is analyzed):
1)     select count(ID) FROM TPERSON where upper(NAME) like 'MIL%';
2)     select count(ID) from TPERSON where NAME like 'Mil%' or (3=5);
In particular we see that a normal index is used while the where-clause contains
an OR-CONDITION.
But if we try the similarly select-statement
3)     select count(ID) FROM TPERSON where upper(NAME) like 'MIL%' or (3=5);
the CBO will not use the function-index I_FUNCTION_TPERSON_NAME and we have a full table scan in the execution-plan.
(This behavior we only expect with views but not with indexes.)
We ask for an advice like a hint, which enable the CBO-usage
of function-based indexes in connection with OR.
This problem seems to be artificial because it contains this dummy logic:
     or (3=5).
This steams from an prepared statement, where this kind of boolean
flag reduce the amount of different select-statements needed for
covering the hole business-logic, while using bind-variables for the
concrete query-parameters.
A more realistic (still boild down) version of our select-statement is:
select * FROM TPERSON
where (upper(NAME) like 'MIL%' or (NAME is null))
and (upper(FIRSTNAME) like 'MICH% or (FIRSTNAME is null))
and ...;
thank you for time..
email: [email protected]

In the realistic statement you write :
select * FROM TPERSON
where (upper(NAME) like 'MIL%' or (NAME is null))
and (upper(FIRSTNAME) like 'MICH% or (FIRSTNAME is null))
and ...;
as far as i know, NULL values are not indexed, "or (NAME is NULL)" have to generate a full table scan.
HTH
We have some problems with functin-based indexes and
the or-condition in a where-clause.
--We use Oracle 8i (8.1.7)
create table TPERSON(ID number(10),NAME varchar2(20),...);
create index I_NORMAL_TPERSON_NAME on TPERSON(NAME);
create index I_FUNCTION_TPERSON_NAME on TPERSON(UPPER(NAME));
The following two statements run very fast on a large table
and the execution-plan asure the usage of the indexes
(-while the session is appropriate configured and the table is analyzed):
1)     select count(ID) FROM TPERSON where upper(NAME) like 'MIL%';
2)     select count(ID) from TPERSON where NAME like 'Mil%' or (3=5);
In particular we see that a normal index is used while the where-clause contains
an OR-CONDITION.
But if we try the similarly select-statement
3)     select count(ID) FROM TPERSON where upper(NAME) like 'MIL%' or (3=5);
the CBO will not use the function-index I_FUNCTION_TPERSON_NAME and we have a full table scan in the execution-plan.
(This behavior we only expect with views but not with indexes.)
We ask for an advice like a hint, which enable the CBO-usage
of function-based indexes in connection with OR.
This problem seems to be artificial because it contains this dummy logic:
     or (3=5).
This steams from an prepared statement, where this kind of boolean
flag reduce the amount of different select-statements needed for
covering the hole business-logic, while using bind-variables for the
concrete query-parameters.
A more realistic (still boild down) version of our select-statement is:
select * FROM TPERSON
where (upper(NAME) like 'MIL%' or (NAME is null))
and (upper(FIRSTNAME) like 'MICH% or (FIRSTNAME is null))
and ...;
thank you for time..
email: [email protected]

How to change recordset bahaviour to accept dynamic column names in the where clause

Hi
im using php-mysql and i make a recordset and i want to make the column names in the where clause to be dynamic like
"select id,name from mytable where $tablename-$myvar";
but when i do this my i break the recordset and it disappear
and when i use variables from advanced recordset it only dynamic for the value of the column not for the column name
and when i write the column name to dynamic as above by hand it truns a red exclamation mark on the server behaviour panel
so i think the only way is to change the recordset behaviour is it? if so How to make it accept dynamic column names?
thanks in advance.

As bregent has already explained to you, customizing the recordset code will result in Dreamweaver no longer recognizing the server behavior. This isn't a problem, but it does mean that you need to lay out your dynamic text with the Bindings panel before making any changes. Once you have changed the recordset code, the Bindings panel will no longer recognize the recordset fields.
Using a variable to choose a column name is quite simple, but you need to take some security measures to ensure that the value passed through the query string isn't attempting SQL injection. An effective way of doing this is to create an array of acceptable column names, and check that the value matches.
// create array of acceptable values
$valid = array('column_name1', 'column_name2', 'column_name3');
// if the query string contains an acceptable column name, use it
if (isset($_GET['colname']) && in_array($_GET['colname'], $valid)) {
$col = $GET['colname'];
} else {
// set a default value if the submitted one was invalid
$col = 'column_name1'
You can then use $col directly in the SQL query.

JSP, Data Web Bean, BC4J: Setting the where clause of a View Object at run time

Hi,
I am trying to develop a data web bean in which the where clause of a View Object will be set at run time and the results of the query then displayed.
My BC4J components are located in one project while the coding for the data web bean is in another project. I used the following code bu t it does not work. Could you please let me know what I am doing wrong?
public void populateOSTable(int P_EmpId)
String m_whereString = "EmpView.EMP_ID = " + P_EmpId;
String m_OrderBy = "EmpView.EMP_NAME";
oracle.jbo.ApplicationModule appModule = null;
ViewObject vo = appModule.findApplicationModule("EMPBC.EMPAppModule").findViewObject("EMPBC.EMPView");
vo.setWhereClause(m_whereString);
vo.setOrderByClause(m_OrderBy);
vo.executeQuery();
vo.next();
String empName numAttrs = vo.getAttribute(EmpName);
System.out.println(empName);
Thanks.

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by JDev Team (Laura):
Here is how I have usually done mine:
1. In the JSP, use a RowsetNavigator bean to set the where clause and execute the query.
2. Use a custom web bean to process the results of the query (print to HTML).
for example:
<jsp:useBean class="oracle.jbo.html.databeans.RowsetNavigator" id="rsn" scope="request" >
<%
// get the parameter from the find form
String p = request.getParameter("p");
String s = request.getParameter("s");
// store the information for reference later
session.putValue("p", p);
session.putValue("s", s);
// initialize the app module and view object
rsn.initialize(application,session, request,response,out,"wt_bc_WT_bcModule.wtjoinView");
// set the where clause string
String theclause = "presname = '" + p + "' AND slideno=" + s;
// set the where clause for the VO
rsn.getRowSet().getViewObject().setWhereClause(theclause);
rsn.getRowSet().getViewObject().executeQuery();
rsn.getRowSet().first();
%>
</jsp:useBean>
<jsp:useBean class="wt_bc.walkthruBean" id="wtb" scope="request" >
<%
// initialize the app module and VO
wtb.initialize(application,session, request,response,out,"wt_bc_WT_bcModule.wtjoinView");
wtb.render();
%>
In this case, the render method of my custom web bean mostly gets some session variables, and prints various content depending on the session variable values.
Hope this helps.
</jsp:useBean><HR></BLOCKQUOTE>
Laura can you give the code of your walkthru bean? i wna't to initialize a viewobject, set the where clause and give that viewobject back to initialize my navigatorbar.
Nathalie
null

How to populate bind variable in view objects where clause in ADF faces

I've got a page with 2 input items.
The user manually enters the first value.
On the second input item I have created a LOV for the item which opens in a popup. How do I restrict the data returned in the LOV using the value entered in the first input item. I have created a bind variable and have included it in the where clause for the view object but how do I populated it.

Here is an example:
Using the HR schema with the EMPLOYEES and DEPARTMENTS tables.
Example is using ADF BC and created an EMPLOYEES entity with an updateable view object for page,
and created a DEPARTMENTS view as a lookup
(SQL: select department_id, department_name from departments where department_name = :DeptName)
1: add method to the backing bean to filter the LOV
public void getTextValueToFilterLOV(ValueChangeEvent valueChangeEvent) {
Object value_from_form = valueChangeEvent.getNewValue();
FacesContext fctx = FacesContext.getCurrentInstance();
Application fapp = fctx.getApplication();
JUFormBinding formBinding = (JUFormBinding)fapp.createValueBinding("#{bindings}").getValue(fctx);
DCIteratorBinding dcBinding = (DCIteratorBinding)formBinding.get("DeptLOVIterator");
ViewObject vo = dcBinding.getViewObject();
vo.setNamedWhereClauseParam("DeptName",value_from_form);
vo.executeQuery();
2. add valueChangeListener to the inputText on the page with an id and autoSubmit="true"
<af:inputText value="#{bindings.LastName.inputValue}" label="#{bindings.LastName.label}" binding="#{backing_DeptForm.inputText3}"
id="inputText3"
autoSubmit="true"
valueChangeListener="#{backing_DeptForm.getTextValueToFilterLOV}">
</af:inputText>
3. reference the LOV with the id name on the partialTriggers property
<af:selectOneChoice value="#{bindings.EmployeesUpdView1DepartmentId.inputValue}"
label="#{bindings.EmployeesUpdView1DepartmentId.label}" binding="#{backing_DeptForm.selectOneChoice1}"
id="selectOneChoice1"
partialTriggers="inputText3">
<f:selectItems value="#{bindings.EmployeesUpdView1DepartmentId.items}"
binding="#{backing_DeptForm.selectItems1}"
id="selectItems1"/>
</af:selectOneChoice>
Summary:
When you entered a text (LastName), that value is passed into the backing bean method.
The Bean method code will find the LOV Iterator and put the value into the bind variable.
Cheers,
Jim

Using a variable to vary the WHERE clause in a statement

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