>Hi,
>
>What is a better practice and more efficient when using a derived table in a SQL Select:
>
>

>select Table1.* T1 where exists (select * from Table2 T2 where T1.pk_fld = T2.pk_fld and T2.fld2 = '123')
>

>
>vs
>
>

>select Table1.* T1 where T1.pk_fld in (select pk_fld from Table2 T2 where T1.pk_fld = T2.pk_fld and T2.fld2 = '123')
>

>
>TIA

I was unable to find the thread I was thinking of where we discussed performance of EXISTS 1 vs. EXISTS *. Today there is a new blog on this topic by Ted Kruger
http://blogs.lessthandot.com/index.php/DataMgmt/DBAdmin/MSSQLServerAdmin/select-vs-select-1-with