mysql - MySQL删除“非活动”行

Question

我有两张桌子：

用户

编号 | 姓名 | 邮件 | 通过 | 盐

条目

编号 | uid | 标题 | 正文 | 时间戳

现在我想删除-table中不存在的entries所有行（已删除用户）uiduser

我认为这可能是这样的：

DELETE entries FROM user, entries WHERE [What comes here? I don't know :(]

Answer 1

DELETE FROM entries WHERE uid NOT IN (SELECT DISTINCT id FROM user);