I use comments to test changes to parameterised stored procedures without having to create or alter the sproc first.
/**/
CREATE PROC Test @param1 INT, @param2 VARCHAR(20) AS
--*/DECLARE @param1 INT/*
--*/DECLARE @param2 VARCHAR(20)/*
--*/
SELECT @param1, @param2
By breaking the close comment in the initial /**/ you coment out the CREATE (or ALTER) statement and uncomment the DECLARE statements.
/**-/
CREATE PROC Test @param1 INT, @param2 VARCHAR(20) AS
--*/DECLARE @param1 INT/*
--*/DECLARE @param2 VARCHAR(20)/*
--*/
SELECT @param1, @param2