Using NVL function in Dynamic SQL

Hi ,
I have created a procedure using the Dynamic SqL and while using the NVL() getting the following error . ORA-00936: missing expression.
The query I have written as
SQL_Txt:=' INSERT INTO VF.tblCData (A, B, C, D, E, F,G,H,I,J)
     SELECT '||l_A||',
     '||l_B||',
     '||l_C||',
          '||l_D||',
          NULL ,
          '||L_F||',
          NVL('||Param1||',''''),
          NVL('||Param2||',''''),
          NVL('||Param3||',''''),
          NULL
          FROM '||ParamTbl1||' WHERE ' ;
and so on.
For Param1 I have data for one execution and Param2 and Param3 is null for that execution.
While executing the same I am getting below
INSERT INTO VF.tblCData (A, B, C, D, E, F,G,H,I,J)
SELECT 25,
     1,
     7,
          6,
          NULL ,
          5,
          NVL(PurchaseDate,''),
          NVL(,''),
          NVL(,''),
          NULL
          FROM xyz.PBuyer@pocdb WHERE
and error ORA-00936: missing expression is popping up for Param2 and Param3 NVL(,'')
Any suggestion to resolve this issue is highly appreciable.
Thanks
Sudipta

NVL(,''),Where's the first argument to NVL? That's the obvious problem. Empty strings are NULL in Oracle anyway, so just lose the NVL and insert the values...
C:\>
C:\>sqlplus hr/hr
SQL*Plus: Release 11.2.0.3.0 Production on Wed May 8 10:08:53 2013
Copyright (c) 1982, 2011, Oracle. All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> set NULL I_AM_NULL
SQL> create table x(y varchar2(20));
Table created.
SQL> insert into x values ('');
1 row created.
SQL> select * from x;
Y
I_AM_NULL
SQL>

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...................1
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Pro*C works bit differently tha sqlplus. try removing the blank line after
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Geordie

Correct my if I am wrong but aren't these equal?
UPDATE service_t SET status = 10100
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(SELECT poid_id0 FROM service_t
WHERE poid_type='/service/telephony'
AND login >= min_login AND login <= max_login);
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AND
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WHERE poid_type='/service/telephony'
AND login >= min_login AND login <= max_login);
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¿Any clue?¿¿¿Over complication???
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2 /
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SQL> Cheers, APC
Blog : http://radiofreetooting.blogspot.com/

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Thanks.
Regards
Edited by: DejanH on Oct 6, 2011 1:32 PM

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<OracleSQLBuilderImpl> <bindParamValue> [470] Binding param "p_depart": 50
<OracleSQLBuilderImpl> <bindParamValue> [471] Binding null of type 12 for "p_job"
<OracleSQLBuilderImpl> <bindParamValue> [472] Binding null of type 12 for "p_hire_od"
<OracleSQLBuilderImpl> <bindParamValue> [473] Binding null of type 12 for "p_hire_do"
The same happens in our query. But ours is much more complex and it takes a lot of time to first execute "empty" query and then with inserted parameter.
We cannot use it.
It looks like bug.
Regards
Edited by: DejanH on Oct 11, 2011 6:52 AM

Using max function in PL/SQL

VERY URGENT...
Am new to oracle...
I've written a package that display gif images in form of histogram/bar chart. using html,
I need to use max function to display values proportionately.
please help. i need to complete this assignment by 2/9/00 by 10.00 am at the latest. I've half written a function but I don't know if there's a simpler way fo doing this. html enabled

First of all Thanks to all gentlemen who replied ..many thanks ...
Tried the ROW_NUMBER() option but still it is taking time...have given output for the query and tkprof results as well. Even when it doesn't fetch any record ( this is a valid cased because the input header id doesn't have any workflow request submitted & hence no entry in the wf_items table)..then also see the time it has taken.
Looked at the RANK & DENSE_RANK options which were suggested..but it is still taking time..
Any further suggestions or ideas as to how this could be resolved..
SELECT 'Y', 'Y', ITEM_KEY
FROM
( SELECT ITEM_KEY, ROW_NUMBER() OVER(ORDER BY BEGIN_DATE DESC) RN FROM
WF_ITEMS WHERE ITEM_TYPE = 'xxxxzzzz' AND ROOT_ACTIVITY = 'START_REQUESTS'
AND SUBSTR(ITEM_KEY,1,INSTR(ITEM_KEY,'-') - 1) = :B1
) T WHERE RN <= 1
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 1 0.00 1.57 0 0 0 0
Fetch 1 8700.00 544968.73 8180 8185 0 0
total 2 8700.00 544970.30 8180 8185 0 0
many thanks

Need help in using sleep function in pl/sql

Hi,
need help:
I have a condition where i want to validate total_pass=total_fail and
I want to use the sleep function in a pl/sql where i want to wait for 2 minutes ie.checking
whether total_pass=total_fail based upon class_id .
I have the data in the table as:
CLASS_ID TOT_PASS TOT_FAIL
1 10 10
2 5 4
3 6 6
4 7 5
Any help will be needful for me

I'm not quite sure what you are lookg for here, but whatever it is, your code as posted won't do it. You will never break out of the WHILE r_Class.Tot_Pass = r_Class.Tot_Fail loop, since these values will never change because you never get the next record form the cursor.
From your original data, it looks like your cursor will return multiple rows which implies to me that you want to fetch the first row from the cursor, check if tot_pass = tot_fail, if they are equal, sleep for two minutes then get the next row. This does not make sense to me. Once the select in the cursor is executed, the data it returns will not change due to Oracle's read consistency model, so there seems to me no point in the sleep.
The other alternative I can see is that you want to check all the returned rows, and if tot_pass = tot_fail for one of the rows (or possibly for all of the rows), then you want to sleep and try again.
If you can explain in words what it is you are trying to accomplish, someone will be able to point you to a solution.
John

Using NVL function in Dynamic SQL

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