Mysql Full join 2表并获得金额的总和

Question

我有两个桌子交易与费用

我试图做出明智的日期声明，在“交易”表中，我已经收到所有费用，在“费用”表中我已经拥有所有费用。

所以我尝试了如下查询

SELECT date(t1.created) as Receive_date, date(t2.created) as Expenses_date, t1.amount as ReceiveAmount, t2.amount as ExpensesAmount 
FROM transactions as t1
LEFT JOIN expenses as t2 ON date(t1.created) = date(t2.created)

UNION

SELECT date(t1.created) as Receive_date, date(t2.created) as Expenses_date, t1.amount as ReceiveAmount, t2.amount as ExpensesAmount 
FROM transactions as t1
RIGHT JOIN expenses as t2 ON date(t1.created) = date(t2.created)

这里是日期2019-11-12，我有3笔收到的款项，但我有1笔开支。对于日期2019-11-12中的费用，我得到的金额是相同金额的3倍。

我还需要将两个日期字段组合为一个日期字段。

经过下面的子查询后尝试

SELECT date(t.created),
t.amount,
ex.amount
FROM `transactions` as t
LEFT JOIN(
    SELECT sum(e.amount) as amount, created
    FROM expenses as e 
) as ex
ON date(ex.created) =  date(t.created)

UNION

SELECT date(ex2.created),
t.amount,
ex2.amount
FROM `transactions` as t

RIGHT JOIN(
    SELECT sum(e.amount) as amount,created
    FROM expenses as e 
) as ex2
ON date(ex2.created) =  date(t.created)

我在输出以下]

我的预期输出

date        ReceiveAmount   ExpensesAmount  
2019-10-15  500             NULL
2019-11-06  500             NULL
2019-11-12  600             100
2019-12-11  50              NULL
2020-01-01  100             NULL
2019-11-01  NULL            500

我有两个表交易和费用我试图做一个日期明智的声明，在交易表中，我所有的收款额都在费用表中，我有所有的费用额。所以我有...

Answer 1

它应该起作用。