在 SQL Server 查询结果中显示小计

Question

SELECT 
    BCD.[EventID],
    M.TargetCategory,
    BCD.[RoundName],
    COUNT(CASE
             WHEN R.Status_Id <> 4
                THEN 1
                ELSE NULL
          END) AS [Outstanding Events]
FROM 
    [dbo].[Event_Details] BCD
LEFT JOIN 
    [dbo].[lkpTarget] M ON BCD.TargetID = M.TargetID
LEFT JOIN 
    [dbo].[EventComments] R ON BCD.EventID = R.[EventID]
GROUP BY 
    BCD.[EventID], M.TargetCategory, BCD.[RoundName]
HAVING 
    COUNT(CASE
             WHEN R.Status_Id <> 4
                THEN 1
                ELSE NULL
          END) > 0
ORDER BY 
    TargetCategory ASC;

上面的查询显示了每个RoundName 的[Outstanding Events]。

有谁知道我可以修改上述查询的最佳方法，以便我可以显示按TargetCategory 分组的[Outstanding Events] 子总计，然后显示整个查询结果的[Outstanding Events] 总计？

Answer 1

使用grouping sets:

GROUP BY GROUPING SETS ( (BCD.[EventID], M.TargetCategory, BCD.[RoundName]),
                         (BCD.[RoundName]),
                         ()
                       )