“SELECT TOP 1 1” VS “IF EXISTS(SELECT 1”

Question

I have some .NET code that checks for the existence of a SQL record at a moderately-high interval. I am looking to make this check as \"cheap\" as possible.

I\'m wo

Answer 1

This is what you want instead of the IF statement

  SELECT ISNULL(
     (SELECT TOP 1 1 FROM BigTable where SomeCol = 200), 0);