mysql - 语法中的mysql循环错误

Question

我正在尝试使用 Heidisql 使用以下语法在 mysql 中使用简单循环。

BEGIN
loop_label:  LOOP
                     IF  @number_title  > @max THEN
                          **LEAVE  loop_label;**
                     END  IF;
select @number_title as number_distinct_title,count(*) as total from (
select count(distinct ctitle), customer_id
FROM table
GROUP BY customer_id
HAVING count(distinct ctitle)=@number_title 
ORDER BY customer_id) as total ;
SET @number_title = @number_title + 1;
END LOOP
END

我在LEAVE loop_label处收到语法错误；

有人可以帮忙吗？

谢谢

Answer 1

在 MySQL 中，当您定义触发器或过程时，通常必须临时更改分隔符，因为触发器/过程中的语句必须以“;”终止。

只需将完整的块括在“--/”和“/”中，你应该会很好

--/
BEGIN
loop_label:  LOOP
                 IF  @number_title  > @max THEN
                      **LEAVE  loop_label;**
                 END  IF;
 select @number_title as number_distinct_title,count(*) as total from (
 select count(distinct ctitle), customer_id
 FROM table
 GROUP BY customer_id
 HAVING count(distinct ctitle)=@number_title 
 ORDER BY customer_id) as total ;
 SET @number_title = @number_title + 1;
 END LOOP
END
 /

从这里找到