SQL “if exists…” dynamic query

Question

Suppose I have a query stored in a variable like this (it\'s actually dynamically populated and more complex, but this is for demonstration purposes):

DECLAR         


        

Answer 1

Try this:

DECLARE @Query NVARCHAR(1000) = 'SELECT @C = COUNT(*) FROM dbo.MyTable'
DECLARE @Count AS INT
EXEC sp_executesql @Query, N'@C INT OUTPUT', @C=@Count OUTPUT

IF (@Count > 0)
BEGIN

END