Displaying 1 result from an estimated 1 matches for "tp4650457".
2012 Nov 22
4
Using cumsum with 'group by' ?
...2 12:03 1 122
2 12:04 4 126
3 12:01 5 5
3 12:02 65 70
3 12:03 23 93
3 12:04 23 116
Any ideas please?
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