题解 | #牛客每个人最近的登录日期(四)#
牛客每个人最近的登录日期(四)
https://www.nowcoder.com/practice/e524dc7450234395aa21c75303a42b0a
select
l.date,count(distinct m.user_id) as new
from
login l left join
(select user_id,min(date) date from login group by user_id) m
on l. date = m.date
group by
date
order by
date
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