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) ,sum(if((year(date)='2021' and month(date)='08'),1,0)) from question_practice_detail
21年8月份练题总数
https://www.nowcoder.com/practice/b8f30b239b454ed490367b53ea95607d
select count(distinct device_id) ,sum(if((year(date)='2021' and month(date)='08'),1,0)) from question_practice_detail
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