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,count(question_id) as question_cnt
from
-- 创建子查询
(
select *,
month(date) as month,
day(date) as day
from question_practice_detail
) as a
where month=8
group by day;
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