收集组合值的总和

Question

我正在尝试执行查询以显示客户余额以及多项客户相关费用的总和，以便我可以检查总余额是否与合并余额相匹配。

我认为我需要在查询中使用GROUP BY，但到目前为止它已被证明是不成功的。我的尝试如下：

select c.ID, m.Balance, SUM(chg.Balance) as CombinedBalance
from Customer c
INNER JOIN ChargeTemplate chg
on c.ID = chg.CustomerID
WHERE c.Balance <> (SELECT SUM(Balance) FROM ChargeTemplate WHERE chg.CustomerID= c.ID )
GROUP BY c.ID, c.Balance
order by c.ID ASC

以上查询输出总余额和总余额余额，但同时显示c.Balance等于合并余额的记录。

以下查询与上述查询完全相同，即使我已删除了WHERE子句。

select c.ID, c.Balance, SUM(chg.Balance) as CombinedBalance
from Customer c
INNER JOIN ChargeTemplate chg
on c.ID = chg.CustomerID
GROUP BY c.ID, c.Balance
order by c.ID ASC

我想要的输出是CUSTOMERTABLE.BALANCE值以及相应的客户费用总和 - 这样，我可以将实际余额与合计金额进行比较。我怎样才能实现这一目标？

注意：费用表具有CustomerTable.CustomerID FK

客户1：

CUSTOMERTABLE.TOTAL_BALANCE = 100.00
CHARGETABLE.CHARGE[1].BALANCE = 20.00
CHARGETABLE.CHARGE[2].BALANCE = 30.00
CHARGETABLE.CHARGE[3].BALANCE = 50.00

客户2：

CHARGETABLE.CHARGE[1].BALANCE = 10.00
CHARGETABLE.CHARGE[2].BALANCE = 20.00
CHARGETABLE.CHARGE[3].BALANCE = 30.00
CHARGETABLE.CHARGE[4].BALANCE = 90.00
CHARGETABLE.CHARGE[5].BALANCE = 50.00

Answer 1

要过滤聚合，请使用HAVING子句

Select
    c.ID, m.Balance, Sum(chg.Balance) as CombinedBalance
From 
    Customer c
        Inner Join
    ChargeTemplate chg
        On c.ID = chg.CustomerID
Group By 
    c.ID, c.Balance
Having 
    m.Balance != Sum(chg.Balance)
Order By
    c.ID ASC