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) as day,count(device_id) as question_cnt from question_practice_detail where date >= '2021-08-01' and date <= '2021-08-31' group by day;