SQL - 具有 3 个交叉表的数据透视表

Question

我的原始数据看起来像

Class Cert  Name  Benefit  Coverage
------------------------------- 
1     1001  ABC    EHC       Family
1     1001  ABC    DEN       Family
2     1002  XYZ    EHC       Single
2     1002  XYZ    DEN       Single
3     1003  LMN    EHC       Couple
3     1003  LMN    DEN       Couple.

我希望最终输出看起来像

**Class**                          **Benefit**
        EHC-Single EHC-Couple EHC-Family    DEN-Single DEN-Couple DEN-Family
1                                   1                                 1
2             1                                  1
3                        1                                 1

列下方的值是证书的计数。

Answer 1

是的，你可以像下面那样做。见SQL Fiddle

;WITH CTE
 AS (SELECT COUNT(*)                 Counts,
            Class,
            Benefit + '-' + Coverage AS [Benefits]
     FROM   ##MyTemp
     GROUP  BY Class,
               Benefit,
               Coverage)
SELECT Class,
       [EHC-Single],
       [EHC-Couple],
       [EHC-Family],
       [DEN-Single],
       [DEN-Couple],
       [DEN-Family]
FROM   CTE
       PIVOT(MAX(Counts)
            FOR [Benefits] IN ([EHC-Single],
                               [EHC-Couple],
                               [EHC-Family],
                               [DEN-Single],
                               [DEN-Couple],
                               [DEN-Family])) AS TempList;