SQL Server output parameter issue

Question

I am using SQL Server 2008 Enterprise. I am learning OUTPUT parameter of SQL Server stored procedure. For example, stored procedure sp_add_jobschedule has an OUTPUT paramete

Answer 1

The question is - why do you want to disallow to provide input? This makes no sense whatsoever. Consider this simple example:

CREATE PROCEDURE test (@param AS INT OUTPUT) AS
BEGIN
  SET @param = 100
END
GO

DECLARE @i INT
SET @i = 0

EXECUTE test @i OUTPUT
PRINT @i

DROP PROCEDURE test

This prints

100

See - how are you supposed to get a value out if you do not put a variable in first?