mysql - MySQL Query - 从三个不同的表中获取总和

Question

我有一个sRecords包含一些数据的表和三个不同的表，每个表都有多行sRecordID（PK）和一fees列，

问题是
我怎样才能sum从匹配的所有三个表中获得总费用sRecordID？

fees其他三个表是具有和sRecordID(FK sRecords.sRecordID)的 cFees、oFees 和 iFees

编辑
我已经有了sRecordID，所以我认为JOIN这里不会有任何工作

Answer 1

select t.sRecordID,sum(t1.Fees)+sum(t2.Fees)+sum(t3.Fees) `Sum Fees`
from sRecords t
left join cFees t1 on t1.feeid=t.sRecordID
left join oFees t2 on t2.feeid=t.sRecordID
left join iFees t3 on t3.feeid=t.sRecordID
group by t.sRecordID

Answer 2

SELECT
   sRecords.sRecordID,
   SUM(cFees.fees) + SUM(oFees.fees) + SUM(iFees.fees) as total_fees
FROM sRecords
LEFT JOIN cFees ON sRecords.sRecordID = cfees.sRecordID
LEFT JOIN iFees ON sRecords.sRecordID = ifees.sRecordID
LEFT JOIN oFees ON sRecords.sRecordID = ofees.sRecordID
GROUP BY sRecords.sRecordID