take a look at this:
http://otn.oracle.com/oramag/oracle/04-mar/o24asktom.html
and search for the Analytics to the Rescue example. Instead of 3 seconds
you want 1800 and instead of sum you want count.Don't forget to group by
ip,of course... And you're done. No need for an extra table.
Hope
Whatabout creating a table containing online users,
where you log every activity with IP, BrowserSession and Timestamp.
You also create a table to track the accual unique visits.
So my logic to solve it :
Update the online table like this (Some rough coding below, not tested at
all, read the
