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
select t1.device_id, t1.university, t1.gpa from user_profile t1 join( select university, min(gpa) as gpa from user_profile group by university ) t2 on t1.university = t2.university and t1.gpa = t2.gpa order by t1.university
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