题解 | #计算用户8月每天的练题数量#
计算用户8月每天的练题数量
http://www.nowcoder.com/practice/847373e2fe8d47b4a2c294bdb5bda8b6
SELECT DISTINCT DAY(qpd.date) AS day ,COUNT(DAY(qpd.date)) AS question_cnt
FROM question_practice_detail qpd
WHERE MONTH(date)=8
GROUP BY day;
#主要得分组
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