计算总在SQL Server总列的2005

Question

我使用SQL Server 2005和VS 2008.I时遇到如下所示

SELECT Month 
    , SUM(Man) AS Man 
    , SUM(Sal) AS Sal 
    , SUM(Man + Sal) AS Total 
FROM (  
     SELECT DATENAME(MONTH, DOB) AS Month 
       , CASE WHEN TypeOfPost = 'Manager' THEN 1 ELSE 0 END AS Man 
       , CASE WHEN TypeOfPost = 'Sales' THEN 1 ELSE 0 END AS Sal 
     FROM tableName 
    ) g   
GROUP BY 
    Month 

，其生成如下的输出

Output-- 
------------------------------------- 
Month  Man  Sal  Total 
-------- ----- ------  --------- 
January  1  1   2 
June   1  NULL  1 
November  1  1   2 

但查询现在我想计算Total栏的总数。所以帮我一下。

Expected Output-- 
------------------------------------- 
Month  Man  Sal  Total 
-------- ----- ------  ------- 
January  1   1   2 
June   1  NULL  1 
November  1   1   2 
------------------------------------- 
         Total  5 
------------------------------------- 

Answer 1

你可以使用在GROUP BY的WITH ROLLUP选项 - 这会给你一个额外的行包含“卷起”（总结）值：

SELECT Month 
    , SUM(Man) AS Man 
    , SUM(Sal) AS Sal 
    , SUM(Man + Sal) AS Total 
FROM (  
     SELECT DATENAME(MONTH, DOB) AS Month 
       , CASE WHEN TypeOfPost = 'Manager' THEN 1 ELSE 0 END AS Man 
       , CASE WHEN TypeOfPost = 'Sales' THEN 1 ELSE 0 END AS Sal 
     FROM tableName 
    ) g   
GROUP BY 
    Month WITH ROLLUP 

额外的生产线将包含NULL对于Month列，而应总结所有其他列你