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 where university='北京大学' union select device_id from question_practice_detail group by device_id having count(device_id)>2 order by device_id desc
