MySQL帶參數的存儲過程小例子
存儲過程P_GET_CLASS_NAME是根據輸入的班級號判斷班級名稱
存儲過程P_INSERT_STUDENT是接收輸入的學生信息,最終將信息插入學生表。 DROP PROCEDURE IF EXISTS `P_GET_CLASS_NAME`;
CREATE PROCEDURE P_GET_CLASS_NAME(IN ID int,OUT NAME VARCHAR(50))
BEGIN
IF(ID = 1) THEN
SET NAME = '一班';
END IF;
IF(ID = 2) THEN
SET NAME = '二班';
END IF;
END;
DROP PROCEDURE IF EXISTS `P_INSERT_STUDENT`;
CREATE PROCEDURE P_INSERT_STUDENT(IN ID INT,IN NAME VARCHAR(10),IN CLASSNO INT,IN BIRTH DATETIME)
BEGIN
SET @ID = ID;
SET @NAME = NAME;
SET @CLASSNO = CLASSNO;
SET @BIRTH = BIRTH;
SET @CLASSNAME = NULL;
CALL P_GET_CLASS_NAME(@CLASSNO,@CLASSNAME);
SET @insertSql = CONCAT('INSERT INTO TBL_STUDENT VALUES(?,?,?,?)');
PREPARE stmtinsert FROM @insertSql;
EXECUTE stmtinsert USING @ID,@NAME,@CLASSNAME,@BIRTH;
DEALLOCATE PREPARE stmtinsert;
END;
CALL P_INSERT_STUDENT(1,'徐越',1,'2012-10-01 10:20:01');
在第二個存儲過程中
①利用SET聲明了參數,調用了第一個存儲過程
②在第一個存儲過程中的NAME參數是輸出參數,所以@CLASSNAME這個參數在調用完第一個過程后就被附值
③最終利用CONCAT拼接SQL語句并傳入參數執行SQL語句
CALL P_INSERT_STUDENT(1,'徐越',1,'2012-10-01 10:20:01');調用存儲過程