如何获取数据中的最大日期时间值并获取相应的数据

Question

输入如下：

9999993612,10/Feb/2016:19:04:16
9999993612,10/Feb/2016:19:04:15
9999993612,10/Feb/2016:19:04:09
9999993612,10/Feb/2016:01:31:47
9999993612,10/Feb/2016:01:31:46
9999993612,10/Feb/2016:01:31:43

我们需要输出。

9999993612,10/Feb/2016:19:04:16

使用linux命令。

Answer 1

****工作正常**********

awk'BEGIN {FS =“，”;打印“NO time”} NR！= 1 {a [$ 1] ++; b [$ 1] = $ 2} END {for（i in a）printf（“％s％s \ n”，i，b [i] ）''FILENAME