SQL Server Query: Fast with Literal but Slow with Variable

Question

I have a view that returns 2 ints from a table using a CTE. If I query the view like this it runs in less than a second

SELECT * FROM view1 WHERE ID = 1
         


        

Answer 1

DECLARE @id INT = 1

SELECT * FROM View1 WHERE ID = @id

Do this

DECLARE @sql varchar(max)

SET @sql = 'SELECT * FROM View1 WHERE ID =' + CAST(@id as varchar)

EXEC (@sql)

Solves your problem