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all parameter data display [message #299474]

Tue, 12 February 2008 03:07

gozuhair
Messages: 206
Registered: January 2008

Senior Member

Sir

I have a report that contains 10 parameters of a same column name "def_prt".I am using in operator in this report for example.

select count(a.wc_id),b.def_prt
from sv_warr a,def_mst b
where a.prt_cd=b.prt_cd
and b.gr_desc in (nvl(:prt_1,b.gr_desc), **Problem area**nvl(:prt_2,b.gr_desc),
nvl(:prt_3,b.gr_desc))
--
--
--
--
--
when i remove all 10 parameter then the output shows all defective parts that is ok but if i select more than one parameter then only 1st input parameter defective parts display instead of all input parameter.

How can i solve this problem

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Re: all parameter data display [message #299511 is a reply to message #299474]

Tue, 12 February 2008 05:06

Littlefoot
Messages: 21823
Registered: June 2005
Location: Croatia, Europe

Senior Member
Account Moderator

I must admit that I don't understand the problem.

Query, the way you've written it, is meaningless - it will always return all records, no matter what is the value of any of these parameters.

Quote:

when i remove all 10 parameter then the output shows all defective parts

True, as NVL's will use 'b.gr_desc'.

Quote:

if i select more than one parameter

You mean, you enter some value into 'prt_1'?

Quote:

then only 1st input parameter defective parts display instead of all input parameter

I wouldn't say so; first parameter's value is used, but NVL's will again make all records to appear. See an example, based on Scott's schema:

SQL> l
  1  select count(*) from emp
  2* where deptno in (nvl(&d1, deptno), nvl(&d2, deptno), nvl(&d3, deptno))
SQL> /
Enter value for d1: null
Enter value for d2: null
Enter value for d3: null

  COUNT(*)
----------
        14

SQL> /
Enter value for d1: 10
Enter value for d2: null
Enter value for d3: null

  COUNT(*)
----------
        14

SQL> /
Enter value for d1: 10
Enter value for d2: null
Enter value for d3: 20

  COUNT(*)
----------
        14

SQL>

As you can see, no matter what is the value of any of these parameters, count(*) will always return all 14 employees.

What are you, actually, trying to do?

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