Question

我正在尝试使我的列等于过滤器使用，但问题是它给出了此错误消息：

column is invalid in the HAVING clause because it is not contained in either an aggregate function or the GROUP BY

当我尝试在select和group中添加过滤器时说：

Column names in each view or function must be unique

因为列和过滤器都是相同的：

专栏：

     userTable.userid

过滤器：

  user_filter.userid

这是我的代码：

SELECT  DISTINCT 
userId,
username,
sum(userItem)
from userTable inner join user_filter
on userTable.userName =  user_filter.userName 
group by userId,
username,
having  userTable.userId =  user_filter.userId

Answer 1

您不需要Having子句只需在Where子句中添加另一个过滤器

SELECT userid, 
       username, 
       Sum(useritem) 
FROM   usertable 
       INNER JOIN user_filter 
               ON usertable.username = user_filter.username 
                  AND usertable.userid = user_filter.userid 
GROUP  BY userid, 
          username

同样DISTINCT也是多余的，因为在Group by已使用select

列在HAVING子句中无效，因为它不包含在聚合函数或GROUP BY中

1 个答案: