Question

我是SQL新手，这是我生命中的第一个SQL程序。我想制作一个包含以下内容的程序：

一张表，其中记录了客户在一周内交付的货物数量，每个货物交付的费率（费用），发货费用。
另一张持有费用的表格，例如燃油，保险，拖车租金等。
我需要获得客户所有费用的总和，以及所有费率的总和（每次负载的挣钱），然后从每个客户的总净支付中减去总费用。

注意：

QuickPay= Rate*0.05
NetPay=Rate-(DispatchFee+QuickPay),
TotalExpenses= Fuel+Advance+Insurance+Trailer
FinalPay=NetPay-TotalExpenses

我为每个表创建了一个查询，以进行计算，但我需要将所有查询组合在一起。以下是查询的代码：

查询TblLInfo

SELECT CustName, sum(Rate) AS RateFee, sum(Disp_Fee) AS DispFee, sum(Rate*0.05) AS QuickPay, sum((Rate)-((Rate*0.05)+(Disp_Fee))) AS NetPay
FROM TblLInfo
GROUP BY CustName;

查询TblExp

SELECT CustName, sum(Fuel) AS FuelFee, sum(Advance) AS AdvanceFee, sum(Insurance) AS InsuranceFee, sum(Trailer) AS TrailerFee, 
sum((Advance)+(Insurance)+(Trailer)+(Fuel)) AS TotalExp
FROM TblExp
GROUP BY CustName;

当我尝试将它们组合时，结果是9（3 * 3），记录为我预期的只有3条记录。

[TblLInfo，（表负载信息），用于收集每位客户运送的负载] [1]

[TblExp（表费用），用于收集每位客户的每周费用] [2]

[查询TblLInfo，获取特定客户的所有负载总和并减去发货费用，这样我们就可以获得净工资] [3]

[查询TblExp，获取特定客户的总费用] [4]

！[在此处输入图片说明] [1]

！[在此输入图片说明] [2]

Answer 1

SELECT a.CustName,a.NetPay,b.TotalExp,(b.TotalExp-a.NetPay) AS overall_profit 
FROM
(SELECT CustName, sum(Rate) AS RateFee, sum(Disp_Fee) AS DispFee, sum(Rate*0.05) AS QuickPay, sum((Rate)-((Rate*0.05)+(Disp_Fee))) AS NetPay FROM TblLInfo GROUP BY CustName) a 
INNER JOIN 
(SELECT CustName, sum(Fuel) AS FuelFee, sum(Advance) AS AdvanceFee, sum(Insurance) AS InsuranceFee, sum(Trailer) AS TrailerFee, sum((Advance)+(Insurance)+(Trailer)+(Fuel)) AS TotalExp FROM TblExp GROUP BY CustName)b

SQL从两个不同的表中添加和减去数据

1 个答案: