SQL Server PIVOT - 多个聚合

2022-01-22 00:00:00 pivot aggregation tsql sql-server

给定以下结果集:

---------------------------------------------------------
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 = SubTotal - Tax

Note that NetTotal = SubTotal - Tax

请帮我计算 sum(SubTotal)、sum(Tax) 和 sum(NetTotal)，以及旋转的 TransType，如下:

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    
--------------------------------------------------------------------------

如果我只有 1 列要汇总，那么使用 PIVOT 将是直接的，但我不确定如何获得 3 个聚合 - 用于 SubTotal、Tax 和 NetTotal.

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.我能想到的最简单的方法是在不同的查询中计算 SubTotal、Tax 和 NetTotal，然后将这些查询与联接结合起来.下面的例子；为了使查询简单，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]

相关文章