从 2 个单独的表中聚合计算

Question

我有一个SALES_RECEIPT 表和一个（销售）RETURNS 表，它们都将REP_ID 作为SALES_REP 表的外键。我想将每个销售代表的总销售额和总回报相加，并计算销售佣金和退货佣金损失。

查询运行没有错误，但列中的值不正确。这些值比实际值要大得多。我尝试了 INNER JOIN 和 LEFT JOIN 来链接 RETURNS 表，但这并没有解决问题。

 SELECT Format(SALES_RECEIPT.SALE_DATE,'yyyy-mm') AS [Year-Month], 
 SALES_REP.rep_Name, 

 Sum(SALES_RECEIPT.SELLING_PRICE*SALES_RECEIPT.quantity) AS [Total Sales], 
 Sum((Nz(SALES_RECEIPT.SELLING_PRICE,0)*Nz(SALES_RECEIPT.quantity,0))*(Nz(SALES_RECEIPT.commission_percent,100)*0.001)) AS [Gross Commission],
 Sum(Nz(returns.selling_price * returns.quantity)) AS [Returns Sales], 
 Sum(Nz(returns.selling_price*returns.quantity)) AS [Returns Sales], Sum((Nz(RETURNS.SELLING_PRICE,0)*Nz(RETURNS.quantity,0))*(Nz(RETURNS.commission_percent,100)*0.001)) AS [Lost Commission], 
 Sum((Nz(SALES_RECEIPT.SELLING_PRICE,0)*Nz(SALES_RECEIPT.quantity,0))*(Nz(SALES_RECEIPT.commission_percent,100)*0.001))-Sum((Nz(RETURNS.SELLING_PRICE,0)*Nz(RETURNS.quantity,0))*(Nz(RETURNS.commission_percent,100)*0.001)) AS [Net Commission]

FROM
 (SALES_RECEIPT INNER JOIN SALES_REP ON SALES_RECEIPT.REP_ID = SALES_REP.REP_ID)
 LEFT JOIN RETURNS ON SALES_RECEIPT.REP_ID = RETURNS.REP_ID
 WHERE (((SALES_RECEIPT.SALE_DATE) Between #1/1/2000# And #12/31/2050#))
 GROUP BY Format(SALES_RECEIPT.SALE_DATE,'yyyy-mm'), SALES_REP.rep_Name;

Answer 1

为 Access 编辑（尝试修复语法）

假设 RETURNS 表有一个到 SALES_RECEIPT 表的 Key ID ？

首先，根据 Date Range 拉取所有 SalesReceipt 记录 然后，根据相同的日期范围拉取所有 RETURNS

WITH totSales as
(
    SELECT
        sr.SalesReceiptID
        ,sr.REP_ID
        ,Format(sr.SALE_DATE,'yyyy-mm') AS [Year-Month] 
        ,(sr.SELLING_PRICE * sr.quantity) AS [Total Sales] 
        ,((Nz(sr.SELLING_PRICE, 0) * Nz(sr.quantity, 0)) * (Nz(sr.commission_percent, 100) * 0.001)) AS [Gross Commission]
    FROM 
        SALES_RECEIPT sr
    WHERE 
        sr.SALE_DATE Between #1/1/2000# And #12/31/2050#
)

,totReturns as 
(
    SELECT
        r.REP_ID 
        ,(Nz(returns.selling_price * returns.quantity)) AS [Returns Sales] 
        ,((Nz(RETURNS.SELLING_PRICE, 0) * Nz(RETURNS.quantity, 0)) * (Nz(RETURNS.commission_percent, 100) * 0.001)) AS [Lost Commission]
    FROM
        RETURNS r
    WHERE
        r.RETURN_DATE Between #1/1/2000# And #12/31/2050#
)

Select
    ts.Year-Month
    ,sr.REP_Name
    ,SUM(ts.[Total Sales]) as 'TotSales'
    ,SUM(ts.[Gross Commission]) as 'TotCommissions'
    ,SUM(ISNULL(tr.[Return Sales],0) as 'TotReturnSales'
    ,SUM(ISNULL(tr.[Lost Commission],0) as 'TotLostCommissions'
From totSales ts
LEFT JOIN totReturns tr on tr.SalesReceiptID = ts.SalesReceiptID
INNER JOIN 
    SALES_REP sr ON ts.REP_ID = sr.REP_ID)
Group By ts.Year-Month, ts.REP_Name;

根据您的上一条评论，我修改了第二个 CTE，以在 SALES_RECEIPT CTE 中使用的同一日期范围内获取所有 RETURNS。这应该为您提供按特定销售代表分组的同一日期范围内的销售额、佣金、退货和损失佣金的适当总和。