select count(distinct device_id) as did_cnt, count(question_id) as question_cnt from question_practice_detail where date >= '2021-08-01' and date <= '2021-08-31'
select count(distinct device_id) as did_cnt, count(question_id) as question_cnt from question_practice_detail where date >= '2021-08-01' and date <= '2021-08-31'
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