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
date,
sum( if( r=1,1,0) )as new
from (
select
user_id,
date,
row_number() over(partition by user_id order by date) as r
from login
) as ln
group by date
order by date
投递去哪儿旅行等公司8个岗位