Question

SET @total_people = (SELECT COUNT(*) FROM tbl_members);
SET @point_available = (SELECT free_bonus from tbl_bonus);

SET @must_use = @total_people * 15;

IF @point_available > @must_use THEN

SET @bonuses = @money_available - @must_use ;
UPDATE tbl_member SET points = points + 15 WHERE 1;
ELSE

SET @bonuses = @points_available / 15;
UPDATE tbl_member SET points = points + 15 LIMIT @bonuses;

END IF;

SELECT @bonuses

:(它不起作用:( .....整个if声明：'（

抱歉XD ....新手在这里......我试图用英语XD制作...而且很难解释hahah btw ...我试图让存储过程即时通讯有问题if语句...我想设置一个处理总成员的变量..和我得到的总分... free_points =总成员* 15;如果总积分大于自由积分，则更新tbl_member积分=积分+15所有其他积分中的一些将获得免费积分...限制总积分/ 15;抱歉英文不好XD

错误：

＃1064 - 您的SQL语法出错;检查与您的MySQL服务器版本对应的手册，以便在'IF point_available＆gt;附近使用正确的语法。 must_use THEN

Answer 1

更改此内容：

SET @point_available =（从tbl_bonus中选择COUNT（free_bonus））;

Answer 2

-_-

大家......我找到了解决方案......

PREPARE STMT FROM 
"UPDATE tbl_member SET points = points + 15 LIMIT ? ";

SET @1st = (SELECT COUNT(*) FROM tbl_member);
SET @2nd = (SELECT free_bonus FROM tbl_bonus);
SET @3rd = @1st * 15; 
SET @4th = @2nd / 15;
SET @5th = (SELECT IF(@3rd > @2nd,@4th,@1st));

EXECUTE STMT USING @5TH;

关于mysql中的if语句

2 个答案: