[thelist] SQL Question

Roger Ly rogerly at bareviking.com
Thu Jun 27 16:35:07 CDT 2002

I'm trying to anayze some data we store about browsers our users use to visit
our site, but I am having a problem querying a good set of data.

We have a table that logs everytime a user logs in with their UserAgent and
their userID (as well as a timestamp, IP address, and other such things).

I want to find out the number of times people login to our system with each
UserAgent.  So far, I have a query like this:

SELECT COUNT(useragent), useragent FROM tblUserSessions
GROUP BY userAgent
ORDER BY useragent

Which does what you'd expect to do -- return each UserAgent, and the number of
times it was used to log in to our system.

But, since I am trying to see how many users logs in with, say Netscape, I want
to filter out all duplicate user logins with the same UserAgent.  So, if a user
logs in twice with Netscape 4.73, I want to log that as one Netscape 4.73, but
if a user logs in once with Netscape 4.51 and once with IE 6.01, I want to log
it as one for each.

This sounds pretty simple to me, but I can't seem to get it to return the
correct results.

Let's just assume tblUserSessions is just (userID, userAgent)

Any SQL gurus out there that can help?


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