Greetings,

while my vote goes to the DBMS solution, I would like to point out that, if the only question you want an answer to is "how many", you just need to record the time at which variations happen, without no "granularity" at all (and the data set gets much smaller.
This means, keep a running count of sessions and, whenever someone logs in/out update it and write it down (to a db table, for instance). This data should be enough to answer all the questions of the form you mentioned.
Cheers,
alf

You can't have everything: where would you put it?

In reply to Re: How to do session times The Right Way by alien_life_form
in thread How to do session times The Right Way by strider corinth

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