Question

我有一张下表：-

CREATE TABLE #TmpData (
 RType Varchar(10),
 Client VARCHAR(10),
 TRequest INT,
 Due INT,
 Month INT
  );

  INSERT INTO #TmpData VALUES ('P', 'Name1',54,67,1),('P', 'Name5',5,47,1),('A', 'Name6',3,90,1 ),('A', 'Name3',4,43,1 ),('P', 'Name1',0,10,2)
  ,('P', 'Name2',1,78,2),('P', 'Name4',54,67,3),('P', 'Name3',5,47,3),('A', 'Name6',3,90,3 ),('P', 'Name8',3,233,3 ),('P', 'Name1',23,457,4)
  ,('P', 'Name7',3,6,4 ),('P', 'Name8',65,548,4 ),('P', 'Name2',3,56,5 ),('P', 'Name3',65,87,6 ),('P', 'Name4',3,56,7 ),('P', 'Name9',65,87,7 )

 SELECT * FROM #TmpData

我想将其数据行明智地转换为列，并按月显示。我正在附上我需要的结果集的屏幕截图。

Result Set

例如，我在这里度过了7个月，但可能长达12个月。

请帮助。

谢谢

Answer 1

您可以尝试将CASE WHEN与SUM功能一起使用。

CASE WHEN比较month和SUM与TRequest或Due group by的比较，
RType，Client

SELECT RType,
       Client,
       SUM(CASE WHEN Month = 1 THEN TRequest ELSE 0 END) 'Jan Totle',
       SUM(CASE WHEN Month = 1 THEN Due ELSE 0 END) '#of Request',
       SUM(CASE WHEN Month = 2 THEN TRequest ELSE 0 END) 'Feb Totle',
       SUM(CASE WHEN Month = 2 THEN Due ELSE 0 END) '#of Request',
       SUM(CASE WHEN Month = 3 THEN TRequest ELSE 0 END) 'March Totle',
       SUM(CASE WHEN Month = 3 THEN Due ELSE 0 END) '#of Request',
       SUM(CASE WHEN Month = 4 THEN TRequest ELSE 0 END) 'April Totle',
       SUM(CASE WHEN Month = 4 THEN Due ELSE 0 END) '#of Request',
       SUM(CASE WHEN Month = 5 THEN TRequest ELSE 0 END) 'May Totle',
       SUM(CASE WHEN Month = 5 THEN Due ELSE 0 END) '#of Request',
       SUM(CASE WHEN Month = 6 THEN TRequest ELSE 0 END) 'June Totle',
       SUM(CASE WHEN Month = 6 THEN Due ELSE 0 END) '#of Request',
       SUM(CASE WHEN Month = 7 THEN TRequest ELSE 0 END) 'July Totle',
       SUM(CASE WHEN Month = 7 THEN Due ELSE 0 END) '#of Request',
       SUM(CASE WHEN Month = 8 THEN TRequest ELSE 0 END) 'Aug Totle',
       SUM(CASE WHEN Month = 8 THEN Due ELSE 0 END) '#of Request',
       SUM(CASE WHEN Month = 9 THEN TRequest ELSE 0 END) 'Sep Totle',
       SUM(CASE WHEN Month = 9 THEN Due ELSE 0 END) '#of Request',
       ....
FROM TmpData
GROUP BY RType,
       Client

sqlfiddle

编辑

如果要将month列设为动态，则可以使用动态数据透视。

DECLARE @cols AS NVARCHAR(MAX),
        @Pivotcols AS NVARCHAR(MAX),
        @query  AS NVARCHAR(MAX);



SET @Pivotcols = STUFF((SELECT DISTINCT 
                                ',SUM(CASE WHEN Month = ' + CAST(Month AS VARCHAR(5)) + ' THEN TRequest ELSE 0 END) as ''' + FORMAT(DATEADD(mm,Month,'1900-01-01'),'MMM') + ' Totle ''',
                                ',SUM(CASE WHEN Month = ' + CAST(Month AS VARCHAR(5)) + ' THEN Due ELSE 0 END) as ''' + FORMAT(DATEADD(mm,Month,'1900-01-01'),'MMM') + ' Totle '''
            FROM TmpData 
            FOR XML PATH(''), TYPE
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'');


set @query = 'SELECT RType,Client, '+  @Pivotcols + ' FROM TmpData GROUP BY RType,Client'



execute(@query)

SQLFIDDLE dynamic pivot

将数据行转换为列，并按月显示

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