题解 | #21年8月份练题总数#
21年8月份练题总数
https://www.nowcoder.com/practice/b8f30b239b454ed490367b53ea95607d
SELECT COUNT(DISTINCT device_id) as did_cnt, count(question_id) from question_practice_detail #where year(date)="2021" and month(date)="8" where date like "2021-08%"
