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(question_id) as question_cnt From question_practice_detail Where year(date)=2021 and month(date)=08 Group by day select day(date) as day,count(*) as question_cnt from question_practice_detail where date >= '2021-08-01' and date < '2021-09-01' group by day;
day函数的运用 year函数 month函数