Using select inside in ()

Question

Hi
I am trying to write an sql as below...
select row1, row2,row3 from table1 where row4 in (select row5,row6 from table2 where row7='string');
I know the above syntax is wrong. what i need is, i have to pass two values selected from another table as arguments in, 'in'
please suggest proper syntax to achieve this result.
Thanks,
Aditya

Answer 1

Hi,
872635 wrote:
Though your logic is correct. its not helping me.
This is going for full scan and taking 15mins to give result... normally it will take less than a secSo you already have some way of doing this that takes less than a second? Why not use that way?
If you're using Oracle 11, you can try UNPIVOT in an IN sub-query, liek this:
SELECT     col1, col2, col3
FROM     table1     t1
WHERE     col4       IN (
                 SELECT  col_5_or_6
                 FROM    table2
                 UNPIVOT (    col_5_or_6
                             FOR  label  IN ( col5
                                          , col6
                 WHERE   col7     = 'string'
;