Question

我的表格设计如下：

BSales：

PCode SaleDate      SaleValue
1     2015-01-01    50000
2     2015-01-01    50000
3     2015-01-01    50000
4     2015-01-01    50000
5     2015-01-01    50000
1     2015-01-02    50000
2     2015-01-02    50000
3     2015-01-02    50000
4     2015-01-02    50000
5     2015-01-02    50000


select PCode,SaleDate,SUM(SaleValue) as Sales 
from [BSales] 
where SaleDate between '2015-01-01' and '2015-01-05' 
group by PCode,SaleDate

这部分满足了我的愿望输出。但我想输出如下：

 PCode  '2015-01-01'    '2015-01-02'    '2015-01-03'    '2015-01-04'    '2015-01-05'
 1      5000            50000           0               0               0    
 2      5000            50000           0               0               0    
 3      5000            50000           0               0               0    
 4      5000            50000           0               0               0    
 5      5000            50000           0               0               0

是否可以使用sql查询？或T-SQL？或使用存储过程？非常感谢任何帮助。

Answer 1

这是支点任务：

DECLARE @t TABLE
    (
      PCode INT ,
      SaleDate DATE ,
      SaleValue MONEY
    )

INSERT  INTO @t
VALUES  ( 1, '2015-01-01', 50000 ),
        ( 2, '2015-01-01', 50000 ),
        ( 3, '2015-01-01', 50000 ),
        ( 4, '2015-01-01', 50000 ),
        ( 5, '2015-01-01', 50000 ),
        ( 1, '2015-01-02', 50000 ),
        ( 2, '2015-01-02', 50000 ),
        ( 3, '2015-01-02', 50000 ),
        ( 4, '2015-01-02', 50000 ),
        ( 5, '2015-01-02', 50000 )

SELECT  PCode ,
        ISNULL([2015-01-01], 0) AS [2015-01-01] ,
        ISNULL([2015-01-02], 0) AS [2015-01-02] ,
        ISNULL([2015-01-03], 0) AS [2015-01-03] ,
        ISNULL([2015-01-04], 0) AS [2015-01-04] ,
        ISNULL([2015-01-05], 0) AS [2015-01-05]
FROM    @t PIVOT( MAX(SaleValue) FOR SaleDate IN ( [2015-01-01], [2015-01-02],
                                                   [2015-01-03], [2015-01-04],
                                                   [2015-01-05] ) ) p

输出：

PCode   2015-01-01  2015-01-02  2015-01-03  2015-01-04  2015-01-05
1       50000.00    50000.00    0           0           0
2       50000.00    50000.00    0           0           0
3       50000.00    50000.00    0           0           0
4       50000.00    50000.00    0           0           0
5       50000.00    50000.00    0           0           0

Answer 2

您需要查看T-SQL中的数据透视表选项。

例如（未经测试！）

SELECT *
FROM BSales
PIVOT(SUM(SaleValue) 
          FOR SaleDate IN ([2015-01-01], [2015-01-02]
                       , [2015-01-03], [2015-01-04], [2015-01-05])) AS PVTTable

这是一个完整的教程。

http://sqlhints.com/2014/03/10/pivot-and-unpivot-in-sql-server/

SQL行输出就像列一样

2 个答案: