>"If you are doing a SELECT ... WHERE IN (SELECT ...) style query, check to see if it's functionally equivalent to an INNER JOIN. This can make a HUGE difference."
>
>Is this statement true, that an inner join is faster than WHERE IN (SELECT ...)?
>Does this differ in VFP vs MSSQL?

Yes, it's true for VFP. The MS SQL Server query optimizer is much smarter and can produce similar or the same execution plan for both cases.