题解 | #北京大学或练题数大于2的学生ID#
北京大学或练题数大于2的学生ID
https://www.nowcoder.com/practice/b2b639586d89409b9c1fa82c083287dd
select device_id from user_profile left join question_practice_detail using(device_id) group by device_id having group_concat(distinct university)='北京大学' or count(*)>2 order by device_id desc