如何在mysql中的单个查询中检查两个条件？

Question

例

------------------------------------------
Amount     |   Type
------------------------------------------
1000       | credit
------------------------------------------
4500       | credit
------------------------------------------
1250       | debit
------------------------------------------
500        |  credit
------------------------------------------


select IFNULL(SUM(amount),0) as Credit_Amount,IFNULL(SUM(amount),0) as Debit_Amount, 
type,party from receipt where  party='$list[id]' and type='credit' or 
type='debit'

产量

Credit_Amount = 6000
Debit_Amount = 1250

在这里，如果类型是credit，则值应与credit变量相加；如果type是debit，则值应与debit相加。 请帮助我解决这个问题。

Answer 1

这是信用查询，您只能根据要求附加。

Select IF(type='Credit', SUM(amount), null) as Credit from receipt