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;
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;
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