题解 | #牛客每个人最近的登录日期(三)#
牛客每个人最近的登录日期(三)
https://www.nowcoder.com/practice/16d41af206cd4066a06a3a0aa585ad3d
select round(count(distinct(l.user_id))/count(distinct(l1.user_id)),3) p from login l,login l1 where (l.user_id,l.date) in (select user_id,date_add(min(date),interval 1 day) next_day from login group by user_id)