我的查询中的 having 子句有什么问题？

【问题标题】：What's wrong with the having clause in my query?我的查询中的 having 子句有什么问题？
【发布时间】：2019-11-10 09:17:31
【问题描述】：

Select facid, sum(slots) as total
from cd.bookings 
group by facid 
having total > 1000
order by facid;

【问题讨论】：

【解决方案1】：

你不能在 HAVING 子句中引用列别名，你必须重复表达式：

Select facid, sum(slots) as total
from cd.bookings 
group by facid 
having sum(slots) > 1000
order by facid;

【讨论】：