mysql-多表关联更新数据

mysql-多表关联更新数据

场景:需要根据部门(department)表的city_id更新对应user(用户表)的city_id字段的值,用户表与部门表的逻辑外键(user表的dept_id)-至于为什么这样做你别管。user-用户表 department-部门表 enabled-是否已删除

UPDATE  `user` u
INNER  JOIN
(SELECT u.id,d.city_id FROM department d INNER JOIN `user` u