Question

我正在处理一个查询，该查询应该返回将由报表使用的数据集。假设我有一个表dbo.payments，其数据如下所示：

-----------------------------------------------
Customer |Commission| Trade Date | Trade Type | 
-----------------------------------------------
AMIRALIS | 20.00    | 22/01/2018 |   SALE     |
BRUSSASH | 30.00    | 22/01/2018 |  PURCHASE  |
AMIRALIS | 10.00    | 22/01/2018 |   SALE     |
AKBMOBIL | 50.00    | 22/01/2018 |  PURCHASE  |
AMIRALIS | 10.00    | 23/01/2018 |  PURCHASE  |
BRUSSASH | 10.00    | 23/01/2018 |  PURCHASE  |
BRUSSASH | 30.00    | 23/01/2018 |   SALE     |
BRUSSASH | 10.00    | 23/01/2018 |  PURCHASE  |
AMIRALIS | 60.00    | 24/01/2018 |  PURCHASE  |
BRUSSASH | 10.00    | 24/01/2018 |   SALE     |

方案1：我想编写一个查询，该查询将为我提供如下所示的结果。请注意，无论where子句如何，该百分比都始终与SUM(Commission)的{{1}}相对。

240.00

是SQL新手，我能走的最远的是：。

----------------------------------------------------- Customer |Total Commission| Trade Date |%Commission | ----------------------------------------------------- AMIRALIS | 30.00 | 22/01/2018 | 0.125 | BRUSSASH | 30.00 | 22/01/2018 | 0.125 | AKBMOBIL | 50.00 | 22/01/2018 | 0.208 | AMIRALIS | 10.00 | 23/01/2018 | 0.041 | BRUSSASH | 50.00 | 23/01/2018 | 0.208 | AMIRALIS | 60.00 | 24/01/2018 | 0.250 | BRUSSASH | 10.00 | 24/01/2018 | 0.041 |

无论WHERE子句如何，我如何达到期望的结果： SELECT [TRADE DATE] AS DATE, CUSTOMER, SUM([COMMISSION]) AS TOTAL, ([COMMISSION] / (SELECT SUM([COMMISSION]) FROM DBO.PAYMENTS)) AS '%COMMISSION' FROM DBO.PAYMENTS GROUP BY [TRADE DATE], CUSTOMER, COMMISSION将总数减少到WHERE [Trade Date] BETWEEN '21/01/2018' AND '24/01/2018'

Answer 1

这可以使用SQL Server窗口函数来解决，例如：

SELECT DISTINCT
    t.Customer,
    SUM(t.Commission) OVER (PARTITION BY Customer, Trade_Date) Total_Commission,
    t.Trade_Date,
     SUM(t.Commission) OVER (PARTITION BY Customer, Trade_Date) / SUM(t.Commission) OVER() "%Commission"
FROM mytable t 
ORDER BY 1, 3

Demo on DB fiddle ：

 Customer | Total_Commission | Trade_Date          | %Commission
 :------- | :--------------- | :------------------ | :----------
 AKBMOBIL | 50.00            | 22/01/2018 00:00:00 | 0.208333   
 AMIRALIS | 30.00            | 22/01/2018 00:00:00 | 0.125000   
 AMIRALIS | 10.00            | 23/01/2018 00:00:00 | 0.041666   
 AMIRALIS | 60.00            | 24/01/2018 00:00:00 | 0.250000   
 BRUSSASH | 30.00            | 22/01/2018 00:00:00 | 0.125000   
 BRUSSASH | 50.00            | 23/01/2018 00:00:00 | 0.208333   
 BRUSSASH | 10.00            | 24/01/2018 00:00:00 | 0.041666

PS：如果您需要按日期过滤输出，则只需在查询中添加WHERE子句即可。这将过滤两个计算。

Answer 2

您可以使用聚合查询。在这种情况下，您可以使用窗口函数来计算总佣金：

select Customer, TradeDate,
       sum(Commission) as total_Commission,
       sum(Commission) / sum(sum(Commission)) over () as percent_commission
from dbo.payments p
group by Customer, TradeDate

针对指定条件计算总计的百分比（SQL Server）

2 个答案: