题解 | #统计复旦用户8月练题情况#
统计复旦用户8月练题情况
https://www.nowcoder.com/practice/53235096538a456b9220fce120c062b3
select up.device_id, university, count(qpd.question_id) as question_cnt, sum(if(result='right',1,0)) as right_question_cnt from user_profile as up left join question_practice_detail as qpd on up.device_id=qpd.device_id where university='复旦大学' group by 1,2
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