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题解 | #浙大不同难度题目的正确率#

select qd.difficult_level,sum(if(qpd.result='right',1,0))/count(qpd.question_id) as correct_rate from user_profile as up inner join question_practice...

2023-02-20

0 290

题解 | #统计复旦用户8月练题情况#

select up.device_id,up.university,count(qpd.question_id) as question_cnt, sum(if(qpd.result='right',1,0)) as right_question_cnt from user_profile as u...

2023-02-20

9 667