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Message Posted: Thu, 01 Nov 2001 @ 19:24:29 GMT

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Subj:   Re: User activity monitor
From:   David Wellman


I think you'll find that the approach I outlined works even for sessions which cross the date boundary.

Towards the end of my explanation I included a bit which caters explicitly for sessions logging on one day 1 and logging off on day 2.

Assume you had a session which logs on at 23:50:00 and logs off at 00:10:00 the following day. Using my approach the calculation using the time elements come out ot a fairly large negative value (-85200). However, when you include the date subtraction this adds on a value of 86400 (number of seconds in a day) so your final answer comes to +1200 which converts to 20 minutes (which is the duration of this session).

Does that answer your question?



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