Filter out non-active systems

[kinsey]

Can someone provide a sample report for filtering out non-active systems from a particular report (like computers not seen in last 30 days)? Also, can this information be filtered out of the OS information in the right-hand column on the Digital dashboard? Thanks in advance for the assistance.

[FethS]

I'm keen on getting a sample report, too.
I know in which table this information is available, but my SQL skills are limited.
A sample report would be great, as well as to get the filter on the OS information reports.
Thanks for any support.