Sql 标记汇总分组行

我的任务是修复一个查询，该查询当前使用GROUP BY和ROLLUP创建总计行

SELECT  CONVERT(date, ShipDate),
        DelNum,
        SUM(ShipQty),
        ROW_NUMBER() OVER(ORDER BY CASE WHEN ShipDate IS NULL THEN 0 ELSE ShipDate END ASC,CASE WHEN DelNum IS NULL THEN 'Z' ELSE DelNum END ASC) 
FROM Shipments 
WHERE Company = 'ABC' AND CustNum = 3 
GROUP BY ShipDate, DelNum, ShipQty WITH ROLLUP 

这就是我被问到的问题。我已经添加了一些标签和一些排序，以使其更具可读性：

SELECT  CONVERT(date, ShipDate),
        CASE WHEN (GROUPING(DelNum) = 1) THEN 'SUB TOTAL FOR ' + CONVERT(NVARCHAR, ShipDate, 111)
            WHEN (GROUPING(ShipQty) = 1) THEN 'SUB TOTAL FOR ' + DelNum
            --WHEN (GROUPING(Total) = 1) THEN 'TOTAL'
            ELSE ISNULL(DelNum, 'UNKNOWN')
        END AS DelNum,
        SUM(ShipQty) Total,
        ROW_NUMBER() OVER(ORDER BY CASE WHEN ShipDate IS NULL THEN 0 ELSE ShipDate END ASC,CASE WHEN DelNum IS NULL THEN 'Z' ELSE DelNum END ASC) 
FROM Shipments 
WHERE Company = 'ABC' AND CustNum = 3 
GROUP BY ShipDate, DelNum, ShipQty WITH ROLLUP 
ORDER BY ShipDate, DelNum, Total ASC

我遇到的问题是我注释掉的那一行。如何标记总行。我总觉得自己没被认出来

任何帮助都将不胜感激。

Total是一个列别名，您不能在分组函数中引用它。您也不能像这样将聚合放在分组函数中：

WHEN (GROUPING(SUM(ShipQty)) = 1)

您可以做的是检查所有的组字段是否都有GROUPING=1：

请注意，您需要将该检查移至案例顶部，否则案例将在评估之前短路，因为每个分组本身等于1

CASE WHEN (GROUPING(ShipDate) = 1 and GROUPING(DelNum) = 1 and GROUPING(ShipQty) = 1) THEN 'TOTAL'
            WHEN (GROUPING(DelNum) = 1) THEN 'SUB TOTAL FOR ' + CONVERT(NVARCHAR, ShipDate, 111)
            WHEN (GROUPING(ShipQty) = 1) THEN 'SUB TOTAL FOR ' + DelNum           
            ELSE ISNULL(DelNum, 'UNKNOWN')
        END AS DelNum