Question

我有2张存款和提款表

Deposit Table:
AccountNumber  Amount
1               200
1               400
1               150
           Total=750

Withdrawal Table:
AccountNumber  Amount
1               100
1               300
1               150
           Total=550

我需要一个查询来汇总每个表的总和。减去（存款 - 取款）Group BY AccountNumber为（750-550）= 200类似：

TotalBalance Table:
AccountNumber  Amount
1               200

我试过Karamafrooz答案

选择SUM（d.Ammount） - SUM（w.Ammount）从存款作为内部联接WithDrawal作为w 在d.AccountNumber = w.AccountNumber 按d.AccountNumber分组

但我的错误值

抱歉，现在我有第3个表叫做Profit：

Profit Table:
AccountNumber  Amount
1               100
1               200
1               150
           Total=450

我需要总额（存款+利润提取）我怎样才能做到这一点？ jim31415解决方案适用于第一种情况

Answer 1

这使用子查询来获取每个表中每个帐户的总计。然后它总结金额。请注意，提款金额被否定，总和（-d.Amount）。

select 
   AccountNumber,
   sum(Amount) as Balance
from (
   select d.AccountNumber as AccountNumber, sum(d.Amount) as Amount from Deposit d group by d.AccountNumber
   union
   select d.AccountNumber, sum(-d.Amount) from Withdrawal d group by d.AccountNumber
) as t
group by AccountNumber

从2个表中减去总计

但我的错误值

1 个答案: