SQL Server PIVOT-多个聚合 [英] SQL Server PIVOT - Multiple Aggregates

问题描述

给出以下结果集:

---------------------------------------------------------
CustomerID  Service  TransType  SubTotal   Tax   NetTotal
---------------------------------------------------------
106            A        CREDIT     12.52     -      12.52 
106            A        CREDIT     10.07     -      10.07
106            B        CREDIT      2.00     -       2.00
106            C        REMOTE      5.99     -       5.99
106            C        CREDIT      5.99     -       5.99
106            C        CREDIT      3.99  0.30       3.69
106            C        CREDIT      5.99  0.30       5.69
106            D        CREDIT      5.99     -       5.99
---------------------------------------------------------

请注意，NetTotal =小计-税额

Note that NetTotal = SubTotal - Tax

请帮我计算总和(SubTotal)，总和(Tax)和总和(NetTotal)，以及透视的TransType，如下所示:

Please help me calculate sum(SubTotal), sum(Tax) and sum(NetTotal), along with pivotted TransType, as follows:

--------------------------------------------------------------------------
CustomerID  Service  Cash  Check  Credit  Remote  SubTotal   Tax  NetTotal
--------------------------------------------------------------------------
106            A        0      0   22.59       0     22.59     0     22.59   
106            B        0      0    2.00       0      2.00     0      2.00    
106            C        0      0   15.97    5.99     21.96  0.60     21.36    
106            D        0      0    5.99       0      5.99     0      5.99    
--------------------------------------------------------------------------

如果我仅要总结一列，那么使用PIVOT会很简单，但是我不确定如何获得3个汇总-小计，税和净额.

If I had only 1 column to be summarized it would be straight forward using PIVOT, but I am not sure how to get the 3 aggregates - for SubTotal, Tax and NetTotal.

感谢您的帮助！

推荐答案

这可以在没有PIVOT的情况下完成:

This can be done without a PIVOT:

SELECT 
  CustomerID
, [Service]
, Cash = SUM(case when TransType='CASH' then SubTotal else 0 end)
, [Check] = SUM(case when TransType='CHECK' then SubTotal else 0 end)
, Credit = SUM(case when TransType='CREDIT' then SubTotal else 0 end)
, [Remote] = SUM(case when TransType='REMOTE' then SubTotal else 0 end)
, SubTotal = SUM(SubTotal)
, Tax = SUM(Tax)
, NetTotal = SUM(NetTotal)
FROM YourTable
GROUP BY CustomerId, [Service]

使用PIVOT，它变得更加复杂.我想到的最简单的方法是在另一个查询中计算SubTotal，Tax和NetTotal，然后将查询与联接合并.下面的例子；为了简化查询，我放弃了现金和支票.

With PIVOT, it gets considerably more complex. The easiest way I can think of is to calculate SubTotal, Tax, and NetTotal in a different query, and then combine the queries with a join. Example below; to keep the query simple, I've discarded Cash and Check.

SELECT  
  a.CustomerId
, a.Service
, Credit = a.Credit
, [Remote] = a.[Remote]
, SubTotal = SUM(b.SubTotal)
, Tax = SUM(b.Tax)
, NetTotal = SUM(b.NetTotal)
FROM (
    SELECT 
      CustomerId
    , [Service]
    , Credit = SUM(Credit)
    , [Remote] = SUM([Remote])
    FROM YourTable a
    PIVOT
    (
        SUM(SubTotal) FOR [TransType] IN ([Credit],[Remote])
    ) pvt
    GROUP BY CustomerId, [Service]
) a
INNER JOIN YourTable b 
    ON a.CustomerID = b.CustomerID 
    AND a.[Service] = b.[Service]
GROUP BY a.CustomerId, a.[Service], a.Credit, a.[Remote]

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