Eugene Elutin (6/17/2014)
Sorry Luis, help with what?
First of all it is a bit different topic. Second the conclusion there does look the same to me:
The Exists operator itself tries to retrieve jus the absolute minimum of information, so the addition of TOP 1 does nothing except add 5 characters to the query size.
I didn't remember exactly the content and made the mistake. But remembered the conclusion and seemed as an additional set of tests for the way that EXISTS work.