题解 | #找出每个学校GPA最低的同学#
找出每个学校GPA最低的同学
http://www.nowcoder.com/practice/90778f5ab7d64d35a40dc1095ff79065
1.group by university 根据大学分组
2.university = u.university 把大学传进去
3.min(gpa) 返回当前大学的
4.gpa = () 进行gpa匹配
select device_id,university,gpa from user_profile u where gpa=(select min(gpa) from user_profile where university = u.university) group by university order by university
