Comment créer un pivot maladroit de la table sql dans SQL Server 2005 ?

Cela devrait vous arranger. C'est vraiment un UNPIVOT et un PIVOT. Notez que vous devez conformer vos données car l'UNPIVOT met toutes les données dans la même colonne.

Notez que j'ai dû recréer/remplir la variable de table dans le SQL dynamique interne - généralement, cela n'est pas nécessaire lorsqu'il s'agit d'une table permanente.

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) ;