Làm thế nào để thực hiện xoay khó khăn của bảng sql trong SQL Server 2005?

Điều này sẽ giúp bạn sắp xếp. Nó thực sự là một UNPIVOT và một PIVOT. Lưu ý rằng bạn phải phù hợp với dữ liệu của mình vì UNPIVOT đặt tất cả dữ liệu vào cùng một cột.

Lưu ý rằng tôi phải tạo lại / tạo lại biến bảng trong SQL động bên trong - thông thường điều này không cần thiết khi xử lý một bảng vĩnh viễn.

SET NOCOUNT ON ;

DECLARE @pivot_cols AS varchar(max) ;
DECLARE @src AS TABLE
    (
     ID int NOT NULL
    ,Label varchar(14) NOT NULL
    ,Numerator int NOT NULL
    ,Denominator int NOT NULL
    ,Ratio decimal(5, 4) NOT NULL
    ) ;

DECLARE @label_order AS TABLE
    (
     Label varchar(14) NOT NULL
    ,Sort int NOT NULL
    )

INSERT  INTO @src
VALUES  (1, 'LabelNameOne', 41, 10, 4.1) ;
INSERT  INTO @src
VALUES  (1, 'LabelNameTwo', 0, 0, 0) ;
INSERT  INTO @src
VALUES  (1, 'LabelNameThree', 21, 10, 2.1) ;
INSERT  INTO @src
VALUES  (1, 'LabelNameFour', 15, 10, 1.5) ;
INSERT  INTO @src
VALUES  (2, 'LabelNameOne', 19, 19, 1) ;
INSERT  INTO @src
VALUES  (2, 'LabelNameTwo', 0, 0, 0) ;
INSERT  INTO @src
VALUES  (2, 'LabelNameThree', 15, 16, 0.9375) ;
INSERT  INTO @src
VALUES  (2, 'LabelNameFive', 19, 19, 1) ;
INSERT  INTO @src
VALUES  (2, 'LabelNameSix', 17, 17, 1) ;
INSERT  INTO @src
VALUES  (3, 'LabelNameOne', 12, 12, 1) ;
INSERT  INTO @src
VALUES  (3, 'LabelNameTwo', 0, 0, 0) ;
INSERT  INTO @src
VALUES  (3, 'LabelNameThree', 11, 12, 0.9167) ;
INSERT  INTO @src
VALUES  (3, 'LabelNameFour', 12, 12, 1) ;
INSERT  INTO @src
VALUES  (3, 'LabelNameSix', 0, 1, 0) ;

INSERT  INTO @label_order
VALUES  ('LabelNameOne', 1) ;
INSERT  INTO @label_order
VALUES  ('LabelNameTwo', 2) ;
INSERT  INTO @label_order
VALUES  ('LabelNameThree', 3) ;
INSERT  INTO @label_order
VALUES  ('LabelNameFour', 4) ;
INSERT  INTO @label_order
VALUES  ('LabelNameFive', 5) ;
INSERT  INTO @label_order
VALUES  ('LabelNameSix', 6) ;

WITH    Labels
          AS (
              SELECT  DISTINCT
                        src.Label
                       ,ISNULL(label_order.Sort, 0) AS Sort
              FROM      @src AS src
              LEFT JOIN @label_order AS label_order
                        ON src.label = label_order.label
             )
    SELECT  @pivot_cols = COALESCE(@pivot_cols + ',', '') + QUOTENAME(Label, '[')
    FROM    Labels
    ORDER BY Sort
           ,Label ;

DECLARE @template AS varchar(max) ;

SET @template = '
DECLARE @src AS TABLE
    (
     ID int NOT NULL
    ,Label varchar(14) NOT NULL
    ,Numerator int NOT NULL
    ,Denominator int NOT NULL
    ,Ratio decimal(5, 4) NOT NULL
    ) ;

INSERT  INTO @src
VALUES  (1, ''LabelNameOne'', 41, 10, 4.1) ;
INSERT  INTO @src
VALUES  (1, ''LabelNameTwo'', 0, 0, 0) ;
INSERT  INTO @src
VALUES  (1, ''LabelNameThree'', 21, 10, 2.1) ;
INSERT  INTO @src
VALUES  (1, ''LabelNameFour'', 15, 10, 1.5) ;
INSERT  INTO @src
VALUES  (2, ''LabelNameOne'', 19, 19, 1) ;
INSERT  INTO @src
VALUES  (2, ''LabelNameTwo'', 0, 0, 0) ;
INSERT  INTO @src
VALUES  (2, ''LabelNameThree'', 15, 16, 0.9375) ;
INSERT  INTO @src
VALUES  (2, ''LabelNameFive'', 19, 19, 1) ;
INSERT  INTO @src
VALUES  (2, ''LabelNameSix'', 17, 17, 1) ;
INSERT  INTO @src
VALUES  (3, ''LabelNameOne'', 12, 12, 1) ;
INSERT  INTO @src
VALUES  (3, ''LabelNameTwo'', 0, 0, 0) ;
INSERT  INTO @src
VALUES  (3, ''LabelNameThree'', 11, 12, 0.9167) ;
INSERT  INTO @src
VALUES  (3, ''LabelNameFour'', 12, 12, 1) ;
INSERT  INTO @src
VALUES  (3, ''LabelNameSix'', 0, 1, 0) ;

WITH    src_conformed
          AS (
              SELECT    ID
                       ,Label
                       ,CAST (Numerator AS decimal(10, 4)) AS Numerator
                       ,CAST (Denominator AS decimal(10, 4)) AS Denominator
                       ,CAST (Ratio AS decimal(10, 4)) AS Ratio
              FROM      @src
             ),
        UNPIVOTED
          AS (
              SELECT    *
              FROM      src_conformed UNPIVOT ( Val FOR Col IN (Numerator, Denominator, Ratio) ) AS unpvt
             )
    SELECT  *
    FROM    UNPIVOTED PIVOT ( SUM(Val) FOR Label IN ({@pivot_cols}) ) AS pvt
    ORDER BY ID
           ,Col ;' ;

SET @template = REPLACE(@template, '{@pivot_cols}', @pivot_cols) ;

EXEC (@template) ;