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>Sergey,
>
>Woohoo I may print and frame this one. *bg*
>
>>>Sergey,
>>>
>>>>It doesn't apply to EXISTS subqueries because SQL Server doesn't retrieve any data for them.
>>>
>>>That is not our experience based on examining the I/Os that occur. I'll see if I can come up with some examples against northwind later tonight.
>>
>>Hi David,
>>
>>It turned out that I was wrong. See EXISTS Subqueries: SELECT 1 vs. SELECT *
>>Quote: "The QP will take and expand all *'s early in the pipeline and bind them to objects (in this case, the list of columns). It will then remove unneeded columns due to the nature of the query."
>>Recomendation: Use something like "SELECT 1 ..."