Question

我正在使用SQL Server 2005和VS 2008.我正在查询如下所示

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

生成以下输出

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

但现在我想计算Total column的总数。所以我帮帮忙。

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

Answer 1

您可以使用WITH ROLLUP中的GROUP BY选项 - 这会为您提供一个额外的行，其中包含“累计”（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

额外的行将包含NULL列的Month，并且应该为您汇总所有其他列

计算SQL Server 2005中的总列数

1 个答案: