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(device_id)
from question_practice_detail
where date between '2021-08-01' and '2021-08-31'
;
21年8月份练题总数
https://www.nowcoder.com/practice/b8f30b239b454ed490367b53ea95607d
select
count(distinct device_id) as did_cnt,
count(device_id)
from question_practice_detail
where date between '2021-08-01' and '2021-08-31'
;
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