I have a list of task end times like below .
I need to know the max end time for each reference id
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I need to know the max end time for each reference id
Reference id | End Time |
140521 | 8/4/14 12:46 AM |
140524 | 8/4/14 1:08 AM |
140602 | 8/5/14 2:12 PM |
140609 | 8/5/14 10:14 AM |
140617 | 8/5/14 10:59 AM |
140618 | 8/6/14 3:55 PM |
140619 | 8/7/14 6:33 PM |
140619 | 8/5/14 10:08 AM |
140619 | 8/9/14 5:49 PM |
140623 | 8/4/14 1:05 AM |
140623 | 8/5/14 6:15 PM |
140624 | 8/5/14 10:15 AM |
140624 | 8/5/14 9:37 AM |
140624 | 8/6/14 10:26 AM |
140625 | 8/6/14 1:34 PM |
140625 | 8/7/14 10:57 AM |
140625 | 8/5/14 1:17 PM |
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