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题解 | 21年8月份练题总数

select count(distinct device_id) as did_cnt, count(question_id) from question_practice_detail where month(date)=8 ;

2025-08-14

0 56

题解 | 浙大不同难度题目的正确率

select difficult_level, round(sum( if(qp.result='right',1,0) )/count(qp.question_id),4) as correct_rate from ...

2025-08-14

0 44