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
month (date) = 8
group by
day
1、day(),month(),year()
2、date_format函数的 date_format(date, '%y-%m') = ‘202108’
3、模糊查询 date like '%2021-08%'
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