Tipos de SP ?? input, output, inputoutput

[iislas]

Esta perfectamente explicado en los libros en linea..........

USE pubs
GO
IF EXISTS(SELECT name FROM sysobjects
WHERE name = 'titles_sum' AND type = 'P')
DROP PROCEDURE titles_sum
GO
USE pubs
GO
CREATE PROCEDURE titles_sum @TITLE varchar(40) = '%', @SUM money OUTPUT
AS
SELECT 'Title Name' = title
FROM titles
WHERE title LIKE @TITLE
SELECT @SUM = SUM(price)
FROM titles
WHERE title LIKE @TITLE
GO

DECLARE @TOTALCOST money
EXECUTE titles_sum 'The%', @TOTALCOST OUTPUT
IF @TOTALCOST < 200
BEGIN
PRINT ' '
PRINT 'All of these titles can be purchased for less than $200.'
END
ELSE
SELECT 'The total cost of these titles is $'
+ RTRIM(CAST(@TOTALCOST AS varchar(20)))
Here is the result set:

Title Name
------------------------------------------------------------------------
The Busy Executive's Database Guide
The Gourmet Microwave
The Psychology of Computer Cooking