Sql 更新Postgres中表的第一行

我有两张桌子：

包含以下列的Corresp：idCorresp、textCorresp、dateCorresp 具有以下列的Trans：idTransf、textTransf、dateTransf、idCorresp

这是一个数据示例：

科雷普斯：

因此，在运行我的查询后，我希望在Trans中获得此结果

我还尝试：

update Trans trans3 set textTransf= textCorresp from ( select Corresp .textCorresp , min(trans.dateTransf) from Trans trans , Corresp corresp, Trans trans2 where corresp.idCorresp= trans.idCorresp and corresp.idCorresp= trans2.idCorresp group by corresp.textCorresp ,trans.dateTransf )as toto WHERE trans3.idTransf = toto.idTransf

---

这是总的想法

update trans
set this = that, etc
where idtransf = 
(select min(idtransf)
from trans
where idCorresp = the one you want)

编辑从这里开始

对于新的需求，这将适用于许多db引擎。希望postgresql就是其中之一

update trans
field = sqfield
from trans join 
(select SomeFieldFromTrans sqlfield, min(idtransf) mintrans
from trans join corresp on the proper fields
group by SomeFieldFromTrans ) sq ob idtransf = mintrans 

---

如果你试着这样做呢

update Trans set textTransf = (select textCorresp from Corresp cr join Trans tx
on cr.idCorresp = tx.idCorresp)
where idTransf = (
select idTransf 
from 
Trans t join Corresp c
on t.idCorresp = c.idCorresp limit 1
)

---

谢谢你的回答，我已经更新了我的问题，我不想在特定的Corresp和Transf中运行我的查询，而是针对这两个表中的所有数据在工作中，当有人在我满足要求后更改要求时，他们欠我一杯啤酒。首先，如何定义表trans的第一行？是最短日期的那一行吗？一条id最小的线？还有别的吗？ update Trans trans3 set textTransf= textCorresp from ( select Corresp .textCorresp , min(trans.dateTransf) from Trans trans , Corresp corresp, Trans trans2 where corresp.idCorresp= trans.idCorresp and corresp.idCorresp= trans2.idCorresp group by corresp.textCorresp ,trans.dateTransf )as toto WHERE trans3.idTransf = toto.idTransf

update trans
set this = that, etc
where idtransf = 
(select min(idtransf)
from trans
where idCorresp = the one you want)

update trans
field = sqfield
from trans join 
(select SomeFieldFromTrans sqlfield, min(idtransf) mintrans
from trans join corresp on the proper fields
group by SomeFieldFromTrans ) sq ob idtransf = mintrans 

update Trans set textTransf = (select textCorresp from Corresp cr join Trans tx
on cr.idCorresp = tx.idCorresp)
where idTransf = (
select idTransf 
from 
Trans t join Corresp c
on t.idCorresp = c.idCorresp limit 1
)