Question

I am using SQL Server 2005 and VS 2008.I am having a query as shown below

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  

which generates the following output

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

But now I want to calculate the total of Total column.So help me out.

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

Answer 1

You could use the WITH ROLLUP option in the GROUP BY – this will give you an extra row that contains the “rolled up” (summed up) values:

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

The extra line will contain NULL for the Month column, and should sum up all other columns for you