MySQL查询删除表A中电子邮件匹配的表A中的记录

Question

我在两个名为'email'的表中有一个公共列，如果在表B中找到匹配，我需要从表A中删除记录。

这会有用吗？有更好的方法吗？

DELETE b.* FROM `tableA` b
JOIN `tableB` u
ON u.email = b.email

Answer 1

DELETE FROM tableA WHERE email IN (SELECT email FROM tableB)

Answer 2

DELETE FROM TableA WHERE email IN (SELECT b FROM TableB)

Answer 3

删除*

DELETE b 
FROM `tableA` b
JOIN `tableB` u ON u.email = b.email