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 DISTINCT u.name u_n,c.name c_n,l.date FROM( SELECT *,ROW_NUMBER() over(partition by user_id ORDER BY DATE DESC) n FROM login) l LEFT JOIN user u ON u.id=l.user_id LEFT JOIN client c ON c.id=l.client_id WHERE n=1 ORDER BY u_n
