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 dayofmonth(date) as day, count(question_id) as question_cnt from question_practice_detail where year(date) = 2021 and month(date)=8 group by day
取年是year()
取月是month()
取日是dayofmonth()