题解 | #牛客每个人最近的登录日期(一)#
牛客每个人最近的登录日期(一)
http://www.nowcoder.com/practice/ca274ebe6eac40ab9c33ced3f2223bb2
窗口函数rank()over()的使用
select user_id,date from (select * , rank()over(partition by user_id order by date desc) as R from login ) as A where R=1
牛客每个人最近的登录日期(一)
http://www.nowcoder.com/practice/ca274ebe6eac40ab9c33ced3f2223bb2
窗口函数rank()over()的使用
select user_id,date from (select * , rank()over(partition by user_id order by date desc) as R from login ) as A where R=1
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