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) AS question_cnt
FROM
question_practice_detail
WHERE
date BETWEEN "2021-08-01" AND "2021-08-31"
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