06 2017 档案

MySQL 一对多查询，合并多的一方的信息
摘要：select c.name, (select group_concat(name) from student s where s.class_id =c.id ) from class c 阅读全文
posted @ 2017-06-08 10:51 newlangwen 阅读(737) 评论(0) 推荐(0)