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
https://www.nowcoder.com/practice/847373e2fe8d47b4a2c294bdb5bda8b6
select day(`date`) `day`, count(device_id) question_cnt from question_practice_detail where year(`date`) = 2021 and month(`date`) = 8 group by `day`;
