MYSQL 使用存储过程批量更新表数据

佚名 6年前 (2019-05-15) 随笔 1115人围观抢沙发百度已收录

DELIMITER //
CREATE PROCEDURE `update_user`()
BEGIN
DECLARE userId BIGINT;
DECLARE openId VARCHAR(40);
declare stop int default 0;
DECLARE cur CURSOR FOR (SELECT open_id,uid FROM user_map);
/*
定义游标的结束,当遍历完成时，将stop设置为null
这里也可以写成 DECLARE CONTINUE HANDLER FOR NOT FOUND SET stop = null;
*/
declare CONTINUE HANDLER FOR SQLSTATE '02000' SET stop = null;
/*开游标*/
OPEN cur;
/*游标向下走一步，将查询出来的两个值付给定义的两个变量*/
FETCH cur INTO openId,userId;
/* 循环体 */
WHILE ( stop is not null) DO
/*更新数据表*/
update user_info set open_id=openId where uid = userId ;
/*游标向下走一步*/
FETCH cur INTO openId,userId;
END WHILE;
/*关闭游标*/
CLOSE cur;
END;
//
DELIMITER ;