Mysql的 存储过程procedure及具体案例

--  代码
DELIMITER $$
CREATE PROCEDURE test1(IN ss VARCHAR(100))
BEGIN
   SELECT ss ;
END $$
-- 调用
SET @s1 = '你好' ;
CALL test1(@s1) ;
-- 

DELIMITER $$
CREATE PROCEDURE testproce(IN score INT,OUT rs VARCHAR(200))
BEGIN
   DECLARE sc INT;
   SET sc = score ;
   IF sc < 0 OR sc > 100 THEN
      SET rs = 'score error';
   ELSEIF sc > 80 THEN
      SET rs = 'A';
   ELSEIF sc > 60 THEN
      SET rs = 'B';
   ELSE
      SET rs = 'C';
   END IF ;
END $$

-- 调用
SET @a1 =60;
SET @a2 = '';
CALL testproce(@a1,@a2);
SELECT @a2 ;
-- 

DELIMITER $$
CREATE PROCEDURE proc_add_looply(IN $className VARCHAR(200),INOUT $insertTimes INT)
BEGIN
    WHILE $insertTimes>0 DO
        INSERT INTO classes VALUES(DEFAULT,$className);
        SET $insertTimes = $insertTimes - 1 ;
    END WHILE;
    COMMIT;
END $$

-- 调用
SET @lp_1 = '班' ;
SET @lp_2 = 5 ;
CALL proc_add_looply(@lp_1,@lp_2);
--

DELIMITER $$
CREATE PROCEDURE show_job_dept(IN no2 INT,OUT job2 VARCHAR(100),OUT dno2 INT)
BEGIN
    SELECT job,deptno INTO job2,dno2 FROM emp WHERE EMPNO = no2;
END $$

-- 调用
SET @sjd_1 = 7369;
SET @sjd_2 = '';
SET @sjd_3 = 0;
CALL show_job_dept(@sjd_1,@sjd_2,@sjd_3);
SELECT @sjd_2 ;
SELECT @sjd_3 ;
--