Not sure what you're aming for here and how your data is structured but
why not use a join and alias and fetch all info in one select and then
solve what you need in your code?
Something in the line of:
select t2.col2 from_t2, t3.col2 from_t3
from table1 t1, table2 t2, table3 t3
where t1.id = t2.id
and t1.id = t3.id
and t1.id = 3
Maybe you can do something like that?
Regards,
Thomas L.
ons 2006-06-21 klockan 17:16 +0800 skrev Song Ken Vern-E11804:
> Hi,
>
> I'm trying to build a query in using SQL instead of doing it in Perl.
>
> I am trying to do something like this :
>
> If ((select col1 from table1 where id = 1) == 3)
> Then
> Select col2 from table2 where table2.id = 1;
> Else
> Select col2 from table3 where table3.id = 1;
>
> In Perl I would probably do have to access the DB twice.
>
> Select col2 from table1 where if = 1;
>
> If (col2 == 3) {
> Select col2 from table2 where table2.id = 1;
> } else {
> Select col2 from table3 where table3.id = 1;
> }
>
> I've read the manual on subqueries but the example don't indicate how I
> can
> do a conditional test using a subquery?
>
> Am I on the right track or is there another way to do this?
>
> Thanks
>
> --
> Ken
> e11804
>
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