问题与功能

Question

SELECT imps.Interest_name as PopularInterests, 
     imps.SUM(Count) AS Total_Count, 
     ints.Vertical_Name 
FROM Impressions imps 
    INNER JOIN Interests ints ON imps.Interest_name = ints.Interest_name 
GROUP BY imps.Interest_name 
HAVING imps.SUM(Count) > 10000; 

查询给我的错误：

Lookup Error - SQL Server Database Error: Cannot find either column "imps" or the user-defined function or aggregate "imps.SUM", or the name is ambiguous

我的表如下所示：

印象：

Interest_Name Count 
Geo_934293  1107 
Geo_934293  852 
Geo_934293  934 
Geo_8133957  1810 
Geo_8133957  909 
Geo_8133957  463 
Geo_8133957  736 
Geo_8133957  7000 

垂直行业：

Interest_Name Vertical_Name 
Geo_934293   X 
Geo_8133957  Y 

和预期的结果将是：

Popular_Interest Total_Count Vertical_Name 
    Geo_8133957  10918    Y 

不知道我要去的地方错了吗？我认为它与SUM函数有关。

Answer 1

您需要使用SUM(imps.Count)而不是imps.SUM(Count)（它是无效的语法）：

SELECT 
    imps.Interest_name as PopularInterests, 
    SUM(imps.Count) AS Total_Count, 
    ints.Vertical_Name 
FROM Impressions imps 
    INNER JOIN Interests ints ON imps.Interest_name = ints.Interest_name 
GROUP BY imps.Interest_name, ints.Vertical_Name 
HAVING SUM(imps.Count) > 10000;