我如何完成此查询？

Question

select * from workers where id = uid and age = uage`   -- sql1
select uid,uage from users where uage>20`              -- sql2

我想使用sql2的条件sql1,即在uid与uage中使用sql1是从何而来sql2.

Answer 1

您可以加入两个表:

SELECT w.*
FROM workers w
INNER JOIN users u
ON w.id = u.uid AND w.age = u.uage
WHERE u.uage > 20