题解 | #查看不同年龄段的用户明细#
计算用户8月每天的练题数量
http://www.nowcoder.com/practice/847373e2fe8d47b4a2c294bdb5bda8b6
select day(date) day
,count(date) question_cnt from question_practice_detail
where date >= '2021-8-01' and date <= '2021-08-31'
GROUP BY date
select day(date) day
,count(date) question_cnt from question_practice_detail
where month(date)=8 and year(date) = 2021
GROUP BY date