Question

我有以下Group By SQL：

SELECT
 s.Login_Name, COUNT(s.s1CIDNumber)
  FROM [dbSuppHousing].[dbo].[tblSurvey] s
  group by s.Login_Name

我想知道如何将此结果集加入另一个表（tblUsers）以将user_id添加到结果集（tblSurvey并且tblUsers在Login_Name上具有1-1关系）

我尝试了以下内容：

Select  u.User_Id from tblUsers u,a.Login_Name
inner join
(SELECT
 s.Login_Name Login_Name, COUNT(s.s1CIDNumber)as abc
  FROM [dbSuppHousing].[dbo].[tblSurvey] s
  group by s.Login_Name) a

 on 
 u.Login_Name=a.Login_Name

我收到错误。问题是 a 的列在外面不可见。

例如a.abc

Answer 1

你错了from tblUsers u,a.Login_Name尝试移动这段代码a.Login_Name来选择

Select  u.User_Id, a.Login_Name from tblUsers u
inner join
(SELECT
 s.Login_Name Login_Name, COUNT(s.s1CIDNumber)as abc
  FROM [dbSuppHousing].[dbo].[tblSurvey] s
  group by s.Login_Name) a

 on 
 u.Login_Name=a.Login_Name

Answer 2

您的from条款位置错误：

Select  u.User_Id, a.*
from tblUsers u inner join
     (SELECT s.Login_Name, COUNT(s.s1CIDNumber) as abc
      FROM [dbSuppHousing].[dbo].[tblSurvey] s
      GROUP BY s.Login_Name
     ) a
     ON u.Login_Name = a.Login_Name;



Answer 3

from应该引用一个表而不是一列：

Select  u.User_Id, a.Login_Name from tblUsers u
inner join

除此之外它应该有用。

Answer 4

有些事情应该这样做。

select
    s.Login_Name, 
    u.col_a,
    u.col_b,
    u.col_c,
    count(s.s1CIDNumber)
from 
    [dbSuppHousing].[dbo].[tblSurvey] s
    join tblUsers t on s.user_id = t.user_id
group by 
    s.Login_Name
    u.col_a,
    u.col_b,
    u.col_c

如何将Group by Query的结果连接到另一个表

4 个答案: