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
https://www.nowcoder.com/practice/90778f5ab7d64d35a40dc1095ff79065
select device_id,university,gpa
from (
select *,
row_number() over (partition by university order by gpa) as rn
from user_profile
) as t2
where rn=1
order by university
子查询中用窗口函数，按university分组 组内按gpa升序排序 再选择出第一个gpa
