Question

我的任务是修复一个当前使用GROUP BY WITH ROLLUP创建总计行的查询。

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

这是我给出的查询。我一直在添加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。如何标记总行数。我一直认为Total无法识别。

任何帮助都将不胜感激。

Answer 1

Total是列别名，您无法在GROUPING函数中引用它。您也不能将聚合放在GROUPING函数中，如下所示：

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

可以做的是检查所有组字段是否为GROUPING() = 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

请注意，您需要将该检查移至CASE的顶部，否则CASE将在评估之前发生短路（因为每个人GROUPING自己等于1）

标记Summed分组行

1 个答案: