当有两个外键引用同一个主键时，如何在 SQL 中的两个表上进行连接？ 这让我发疯

Question

What the title says. I've tried connecting two tables with two foreign keys referencing the same primary key and cannot get it to work.

Answer 1

Use table aliases . For example:

select *
from money_transfer t
join account s on t.sender_id = s.id
join account r on t.receiver_id = r.id

Here you can see two references to the same PK ( account.id ). The first time the table is given the alias s and the second time the same table is given the alias r . This way you can differentiate which one you want to use on each join predicate.