题解 | #分组过滤练习题#
21年8月份练题总数
http://www.nowcoder.com/practice/b8f30b239b454ed490367b53ea95607d
SELECT COUNT(DISTINCT device_id) as did_cnt,count(question_id) as question_cnt FROM question_practice_detail WHERE date BETWEEN '2021-08-01' AND '2021-09-01';
查看26道真题和解析