Question

美好的一天，

我有以下两个表：

tMaster

＆＃13;

TruckID      TruckRegisterName
------------------------------
1                  DL 1LK8520
2                  DL 4XB9634
3                  DL 1FH4253
4                  DL 9EA1539
5                  DL 1XV5408

＆＃13;

DailyCons

＆＃13;

TruckID      TripDate      DieselConsumed
---------------------------------------------
1              22-Nov-14              396.0
1              1-Nov-14                743.0
4              11-Nov-14              226.0
2              16-Nov-14              556.0
5              30-Nov-14              745.0
4              3-Nov-14                357.0
1              14-Nov-14              459.0
3              10-Nov-14              142.0
2              4-Nov-14                855.0
3              23-Nov-14              393.0
4              19-Nov-14              680.0
5              14-Nov-14              416.0
2              18-Nov-14              800.0
2              16-Nov-14              996.0
4              25-Nov-14              236.0
5              18-Nov-14              126.0
3              3-Nov-14                901.0

＆＃13;

我被要求有以下输出

＆＃13;

-----------------------------------------------------------------------------
                        TruckID
----------------------------------------------------------------------------
Date              1          2          3          4          5
-----------------------------------------------------------------------------
1-Nov-14       743.0				
3-Nov-14                              901.0      357.0	
4-Nov-14		          855.0			
10-Nov-14	                          142.0		
11-Nov-14                                        226.0	
14-Nov-14      459.0                                       416.0
16-Nov-14                1552.0
18-Nov-14                 800.0                            126.0
19-Nov-14                                        680.0	
22-Nov-14      396.0				
23-Nov-14                             393.0		
25-Nov-14                                        236.0	
30-Nov-14                                                   745.0

＆＃13;

据我所知，以上将基于PIVOT功能，但不知道如何去做。最重要的是，我被告知我必须使用聚合函数，但我的输出没有涉及任何计算。感谢上面的任何帮助。

Answer 1

您需要的只是conditional SUM

SELECT TripDate,
       Sum(CASE WHEN TruckID = 1 THEN DieselConsumed END) [1],
       Sum(CASE WHEN TruckID = 2 THEN DieselConsumed END) [2],
       Sum(CASE WHEN TruckID = 3 THEN DieselConsumed END) [3],
       Sum(CASE WHEN TruckID = 4 THEN DieselConsumed END) [4],
       Sum(CASE WHEN TruckID = 5 THEN DieselConsumed END) [5]
FROM   DailyCons
GROUP  BY TripDate

或使用Pivot

SELECT *
FROM   (SELECT *
        FROM   DailyCons)a
       PIVOT (Sum(DieselConsumed)
             FOR TruckID IN([1],
                            [2],
                            [3],
                            [4],
                            [5])) piv

使用两个表中的pivot输出

1 个答案: