题解 | 牛客每个人最近的登录日期(二)
牛客每个人最近的登录日期(二)
https://www.nowcoder.com/practice/7cc3c814329546e89e71bb45c805c9ad
select b.name u_n,c.name c_n ,a.date from login a join user b on a.user_id=b.id join client c on a.client_id=c.id where (a.user_id,a.date) in (select user_id,max(date) from login group by user_id) order by b.name
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