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 c.name u_n, b.name b_n, date FROM login a LEFT JOIN user c ON a.user_id=c.id LEFT JOIN client b ON a.client_id=b.id WHERE (a.user_id,a.date) IN ( select user_id,max(date) from login group by user_id ) ORDER BY u_n
where原来要加括号才能用in过滤多个内容
