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(*) as question_cnt
from question_practice_detail
where year(date) = 2021 and month(date) = 8
group by day
新语句,提取日期年月日直接用day(),month()或year(),所以时间hour/min/sec也有类似的吗?需查证
