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) = '08'
group by day
看到题目，应该是条件查询；
获取年月日的函数分别是什么；
计算每天的数量、用到group by
