题解 | 浙大不同难度题目的正确率
浙大不同难度题目的正确率
https://www.nowcoder.com/practice/d8a4f7b1ded04948b5435a45f03ead8c
select difficult_level,avg(result='right') correct_rate from user_profile up inner join question_practice_detail qpd on up.device_id=qpd.device_id inner join question_detail qd on qpd.question_id=qd.question_id where university='浙江大学' group by difficult_level order by correct_rate;
