NOT IN Operator

Question

Hi Friends,
I am having problem in Not IN Operator.
My Query is--
select ord_no,ord_date
from ord_tab
where NVL(stat_flag,'P') not in ('I','i');
it should not give any data.
but is' giving me data.
when i remove NVL, It work fine.
but in some cases it can be null.
how to solve this ? any other alternative for this.
Regards
KarTiK PareeK.

Answer 1

Or you can use CASE, I find it more readable, especially when you have multiple OR's or AND's:
select  ord_no
,       ord_date
from    ord_tab
where 
        ( CASE
                   WHEN stat_flag NOT IN ('I','i') THEN 1  --  could be written as  WHEN UPPER(stat_flag) != 'I' THEN 1 too by the way
                   WHEN stat_flag IS NULL THEN 1
          END ) = 1Edited by: hoek on Apr 1, 2009 6:14 PM