Question

我有一个包含三列和18行的表。我想换成有两行的18列。这是表

 Category   Bands   Points
 20_CAT1    21-22   10
 20_CAT2    23-25   20
 20_CAT3    26- 30
 30_CAT1    31-33   10
 30_CAT2    34-38   20
 30_CAT3    39- 30
 40_CAT1    41-44   5
 40_CAT2    45-50   15
 40_CAT3    51- 25
 50_CAT1    50-55   5
 50_CAT2    56-63   15
 50_CAT3    64- 25
 60_CAT1    61-66   5
 60_CAT2    67-75   20
 60_CAT3    76- 30
 70_CAT1    71-77   5
 70_CAT2    78-88   20
 70_CAT3    89- 30

新表应该有＆＃34;类别＆＃34;作为带有＆＃34; Bands＆＃34;的列。和＆＃34;积分＆＃34;作为行

我不确定如何使用Cross Apply和Pivot来执行此操作，或者即使这是正确的方法。

提前致谢。

Answer 1

我设法在不使用PIVOT的情况下让以下工作。

        SELECT
        MAX(CASE WHEN Category = '20_CAT1' THEN Bands END) [20_CAT1_Bands],
        MAX(CASE WHEN Category = '20_CAT1' THEN Points END) [20_CAT1_Points],
        MAX(CASE WHEN Category = '20_CAT2' THEN Bands END) [20_CAT2_Bands],
        MAX(CASE WHEN Category = '20_CAT2' THEN Points END) [20_CAT2_Points],
        MAX(CASE WHEN Category = '20_CAT3' THEN Bands END) [20_CAT3_Bands],
        MAX(CASE WHEN Category = '20_CAT3' THEN Points END) [20_CAT3_Points],

        MAX(CASE WHEN Category = '30_CAT1' THEN Bands END) [30_CAT1_Bands],
        MAX(CASE WHEN Category = '30_CAT1' THEN Points END) [30_CAT1_Points],
        MAX(CASE WHEN Category = '30_CAT2' THEN Bands END) [30_CAT2_Bands],
        MAX(CASE WHEN Category = '30_CAT2' THEN Points END) [30_CAT2_Points],
        MAX(CASE WHEN Category = '30_CAT3' THEN Bands END) [30_CAT3_Bands],
        MAX(CASE WHEN Category = '30_CAT3' THEN Points END) [30_CAT3_Points],

        MAX(CASE WHEN Category = '40_CAT1' THEN Bands END) [40_CAT1_Bands],
        MAX(CASE WHEN Category = '40_CAT1' THEN Points END) [40_CAT1_Points],
        MAX(CASE WHEN Category = '40_CAT2' THEN Bands END) [40_CAT2_Bands],
        MAX(CASE WHEN Category = '40_CAT2' THEN Points END) [40_CAT2_Points],
        MAX(CASE WHEN Category = '40_CAT3' THEN Bands END) [40_CAT3_Bands],
        MAX(CASE WHEN Category = '40_CAT3' THEN Points END) [40_CAT3_Points],

        MAX(CASE WHEN Category = '50_CAT1' THEN Bands END) [50_CAT1_Bands],
        MAX(CASE WHEN Category = '50_CAT1' THEN Points END) [50_CAT1_Points],
        MAX(CASE WHEN Category = '50_CAT2' THEN Bands END) [50_CAT2_Bands],
        MAX(CASE WHEN Category = '50_CAT2' THEN Points END) [50_CAT2_Points],
        MAX(CASE WHEN Category = '50_CAT3' THEN Bands END) [50_CAT3_Bands],
        MAX(CASE WHEN Category = '50_CAT3' THEN Points END) [50_CAT3_Points],

        MAX(CASE WHEN Category = '60_CAT1' THEN Bands END) [60_CAT1_Bands],
        MAX(CASE WHEN Category = '60_CAT1' THEN Points END) [60_CAT1_Points],
        MAX(CASE WHEN Category = '60_CAT2' THEN Bands END) [60_CAT2_Bands],
        MAX(CASE WHEN Category = '60_CAT2' THEN Points END) [60_CAT2_Points],
        MAX(CASE WHEN Category = '60_CAT3' THEN Bands END) [60_CAT3_Bands],
        MAX(CASE WHEN Category = '60_CAT3' THEN Points END) [60_CAT3_Points],

        MAX(CASE WHEN Category = '70_CAT1' THEN Bands END) [70_CAT1_Bands],
        MAX(CASE WHEN Category = '70_CAT1' THEN Points END) [70_CAT1_Points],
        MAX(CASE WHEN Category = '70_CAT2' THEN Bands END) [70_CAT2_Bands],
        MAX(CASE WHEN Category = '70_CAT2' THEN Points END) [70_CAT2_Points],
        MAX(CASE WHEN Category = '70_CAT3' THEN Bands END) [70_CAT3_Bands],
        MAX(CASE WHEN Category = '70_CAT3' THEN Points END) [70_CAT3_Points]

    FROM @table

SQL将列转换为行

1 个答案: