Question

我在查询中使用了交叉表，根据需要将行转换为列。我仍然远离预期的结果。这里我给出了一些测试数据

Declare  @tblDepartment Table
(
    DepartmentID int,
    DepartmentName nvarchar(10) 

)
Insert into @tblDepartment
Select 30,'AA'
union 
Select 31,'BB'
union 
Select 32,'CC'
union 
Select 33,'DD'
union 
Select 34,'EE'

SELECT * FROM @tblDepartment
/*************************************************/
Declare  @tblCurrency Table
(
    CurrencyID int,
    CurrencyName nvarchar(10)   

)

Insert into @tblCurrency

Select 1,'AUD'
union 
Select 2,'USD'
union 
Select 3,'Euro'
union 
Select 4,'GBP'

SELECT * FROM @tblCurrency


/*************************************************/
Declare  @tblSale Table
(
    ProductID int,
    DepartmentID int,   
    CurrencyID int,
    Value money

)

Insert into @tblSale

Select 1,   30, 2,  160.00 UNION
Select 1,   30, 3,  91927.00 UNION
Select 1,   32, 3,  914426.00 UNION
Select 1,   34, 4,  121.00 UNION
Select 2,   33, 4,  121.00 UNION
Select 2,   32, 4,  121.00 UNION
Select 2,   33, 2,  100.00 UNION
Select 2,   33, 3,  2000.00 UNION
Select 2,   33, 4,  121.00 UNION
Select 2,   32, 2,  52.00 UNION
Select 2,   32, 3,  5450.00 UNION
Select 2,   32, 4,  121.00 UNION
Select 2,   34, 1,  250.00 UNION
Select 2,   34, 2,  240.00 UNION
Select 2,   34, 3,  4540.00 UNION
Select 2,   34, 4,  8972.00

SELECT * FROM @tblSale

这是输出

DepartmentID DepartmentName
    30  AA
    31  BB
    32  CC
    33  DD
    34  EE

CurrencyId CurrencyName
    1   AUD
    2   USD
    3   Euro
    4   GBP

ProductID DepartmentID CurrencyID Value
    1   30  2   160.00
    1   30  3   91927.00
    1   32  3   914426.00
    1   34  4   121.00
    2   33  4   121.00
    2   32  4   121.00
    2   33  2   100.00
    2   33  3   2000.00
    2   33  4   121.00
    2   32  2   52.00
    2   32  3   5450.00
    2   32  4   121.00
    2   34  1   250.00
    2   34  2   240.00
    2   34  3   4540.00
    2   34  4   8972.00

当我使用交叉表时，它会给我以下结果

Select ProductID, DepartmentID,
Sum(CASE CurrencyID When 1 then value else 0 END) as AUD,
Sum(CASE CurrencyID When 2 then value else 0 End) as USD,
Sum(CASE CurrencyID When 3 then value else 0 END) as EURO,
Sum(CASE CurrencyID When 4 then value else 0 End) as GBP
from 
(
    SELECT      T.ProductID, T.DepartmentID, T.CurrenCyID, T.Value
    FROM         @tblSale AS T 

) S
Group By ProductID, DepartmentID
Order By ProductID, DepartmentID


ProductID   DepartID    AUD         USD         Euro            GBP
1           30          0.00        160.00      91927.00        0.00
1           32          0.00        0.00        914426.00       0.00
1           34          0.00        0.00        0.00            121.00
2           32          0.00        52.00       5450.00         121.00
2           33          0.00        100.00      2000.00         121.00
2           34          250.00      240.00      4540.00         8972.00

但我需要针对每个产品显示所有部门的默认零值，如果不存在的话。

ProductID   DepartID    AUD         USD         Euro            GBP
1           30          0.00        160.00      91927.00        0.00
1           31          0.00        0.00        0.00            0.00
1           32          0.00        0.00        914426.00       0.00
1           33          0.00        0.00        0.00            0.00
1           34          0.00        0.00        0.00            121.00
2           30          0.00        0.00        0.00            0.00
2           31          0.00        0.00        0.00            0.00
2           32          0.00        52.00       5450.00         121.00
2           33          0.00        100.00      2000.00         121.00
2           34          250.00      240.00      4540.00         8972.00

有什么建议吗？

Answer 1

您需要先生成完整的产品和部门列表，然后将其加入到您提出的查询中，如下所示：


select
    ProductID, 
    DepartmentID,
    isnull(AUD, 0) as AUD,
    isnull(USD, 0) as USD,
    isnull(EURO, 0) as EURO,
    isnull(GBP, 0) as GBP
from
(
    select DepartmentID from @tblDepartment
    cross join
    select distinct ProductID from @tblSale
) a
left join
    (
        Select ProductID, DepartmentID,
        Sum(CASE CurrencyID When 1 then value else 0 END) as AUD,
        Sum(CASE CurrencyID When 2 then value else 0 End) as USD,
        Sum(CASE CurrencyID When 3 then value else 0 END) as EURO,
        Sum(CASE CurrencyID When 4 then value else 0 End) as GBP
        from 
            @tblSale
        Group By 
            ProductID, DepartmentID
    ) b
on 
    a.DepartmentID = b.DepartmentID and a.ProductID = b.ProductID
Order By 
    a.ProductID, a.DepartmentID

你没有提到产品表的存在，如果存在这样的东西，最好在产品列表生成中使用它而不是我在这里对销售表的选择区别。

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