题解 | #21年8月份练题总数#
21年8月份练题总数
http://www.nowcoder.com/practice/b8f30b239b454ed490367b53ea95607d
select count(distinct device_id) as did_cnt,count(1) as question_cnt
from question_practice_detail
where DATE_FORMAT(date,"%Y%m") = '202108'
21年8月份练题总数
http://www.nowcoder.com/practice/b8f30b239b454ed490367b53ea95607d
select count(distinct device_id) as did_cnt,count(1) as question_cnt
from question_practice_detail
where DATE_FORMAT(date,"%Y%m") = '202108'
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