如何使用动态T-SQL数据透视表更改输出

Question

这是我的表格。

CREATE TABLE tpivot 
    ([col1] varchar(80), [col2] varchar(80), [col3] varchar(80), [col4] varchar(80), [col5] varchar(80)) 
; 

INSERT INTO tpivot 
    ([col1], [col2], [col3], [col4], [col5]) 
VALUES 
    ('Datum', 'EC', 'Mastercard', 'Postfinance', 'VISA'), 
    ('01.12.2014', '-204.9', '-88', '0', '-19'), 
    ('02.12.2014', '-352.9', '0', '79.9', '-20'), 
    ('03.12.2014', '-105', '-182', '0', '-436'), 
    ('04.12.2014', '-371', '-122,9', '-751', '-343') 

; 

我的目标是打开表格，使输出看起来像这样。

col1   col2   col3  col4  col5 
Datum  01.12.2014 02.12.2014 03.12.2014 04.12.2014 
EC   -204.9  -352.9  -105  -371 
Mastercard -88   0   -182  -112.9 
Postfinance 0   -79.9  0   -751 
VISA   -19   -20   -436  -346 

我需要一个动态数据透视表，因为我从每次可能有不同数量列的csv导入表。

有人可以帮助我吗？我甚至不能获取静态枢轴工作:(

感谢

Answer 1

这里是我的动态SQL的解决方案。

IF OBJECT_ID('tPivot') IS NOT NULl 
    DROP TABLE tpivot; 

CREATE TABLE tpivot 
    (ID INT IDENTITY(1,1), [col1] varchar(100), [col2] varchar(100), [col3] varchar(100), [col4] varchar(100), [col5] varchar(100)); 
INSERT INTO tpivot 
    ([col1], [col2], [col3], [col4], [col5]) 
VALUES 
    ('Datum', 'EC', 'Mastercard', 'Postfinance', 'VISA'), 
    ('01.12.2014', '-204.9', '-88', '0', '-19'), 
    ('02.12.2014', '-352.9', '0', '79.9', '-20'), 
    ('03.12.2014', '-105', '-182', '0', '-436'), 
    ('04.12.2014', '-371', '-122,9', '-751', '-343'); 

DECLARE @ColList VARCHAR(MAX), 
     @IdList VARCHAR(MAX); 

SELECT @ColList = COALESCE(@ColList + ',','') + QUOTENAME(A.COLUMN_NAME), 
     @IdList = COALESCE(@IdList + ',','') + QUOTENAME(ROW_NUMBER() OVER (ORDER BY ORDINAL_POSITION)) 
FROM INFORMATION_SCHEMA.COLUMNS A 
WHERE TABLE_NAME = 'tPivot' 
     AND COLUMN_NAME ! ='ID' 

--SELECT @ColList 
--SELECT @IdList 


EXEC (
'WITH CTE 
AS 
(
    SELECT * 
    FROM 
    (
     SELECT ID, 
       Column_Name, 
       ROW_NUMBER() OVER (PARTITION BY ID ORDER BY col) row_num, 
       val 
     FROM tPivot A 
     INNER JOIN (SELECT Column_Name AS COLUMN_NAME, ORDINAL_POSITION FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = ''tPivot'') B 
     ON A.ID = B.ORDINAL_POSITION - 1 
     UNPIVOT 
     (
      val for col in (' + @colList + ') 
     ) unpvt 
    ) A 
    PIVOT 
    (
     MAX(val) FOR column_name IN (' + @colList + ') 
    ) pvt 
) 

SELECT * 
FROM 
(
    SELECT ID, 
      row_num, 
      coalesce(' + @colList + ') val 
    FROM cte 
) A 
PIVOT 
(
    MAX(val) FOR ID IN (' + @IdList + ') 
) pvt' 
)