mysql用一个表更新另一个表的方法

Solution 1: 修改1列 update student s, city c set s.city_name = c.name where s.city_code = c.code; Solution 2: 修改多个列 update a, b set a.title=b.title, a.name=b.name where a.id=b.id Solution 3: 采用子查询 update student s set city_name = (select name from city where code = s.city_code); 以上这篇mysql用一个表更新另一个表