Determine the time difference from records in a select

I apologize in advance, 'cause I think this was addressed a couple of months
ago, but I cannot find it in the archives.

I have a firewall hit database which keeps the date of the hit and the
offenders IP (among other items).  I would like to be able to execute a
select which would show each unique IP and the time difference from the
latest hit to the first hit.  I can do this in scripts, but was wondering if
there is a pure SQL query/queries way to accomplish this.

Help?
Rob

Robert Creager
Senior Software Engineer
Client Server Library
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