mysql的过程和Oracle的区别

CREATE OR REPLACE
如果需要用到这句,可以使用

DROP FUNCTION IF EXISTS `GetUserName`;

CREATE FUNCTION `GetUserName`(nUserID INT) ...
代替.

CREATE OR REPLACE   PROCEDURE  sp_test()
BEGIN
SET @z = 'hello World';
SELECT @z ;
END;

DELIMITER $$

DROP FUNCTION IF EXISTS `GetUserName`$$

CREATE FUNCTION `GetUserName`(nUserID INT)
RETURNS VARCHAR(64)
BEGIN
DECLARE sUserName VARCHAR(64);
SELECT FirstName INTO sUserName FROM Users WHERE Seq = nUserID;
RETURN sUserName;
END$$

DELIMITER ;