题解 | 找出每个学校GPA最低的同学 - 依然面试前紧集复健窗口函数

select
    device_id,
    university,
    gpa
from
    (
        select
            device_id,
            university,
            gpa,
            row_number() over (
                partition by
                    university
                order by
                    gpa
            ) as ranking
        from
            user_profile
    ) t
where
    ranking = 1
order by
    university

妈的为什么之前数分实习没用过窗口函数呢，一点都不熟悉，我的