>>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-withThank you
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