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 t3.difficult_level, sum(if (t1.result='right',1,0 ))/count(t1.question_id)correct_rate from question_practice_detail as t1 left join user_profile as t2 on t1.device_id=t2.device_id left join question_detail as t3 on t1.question_id=t3.question_id where t2.university='浙江大学' group by difficult_level order by correct_rate asc
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