Network Round Trip History

I have a need to dig into the numbers collected for the Round Trip metric.  I am not seeing a way to put a custom date/time range to view numbers collected in the past - only last hour, day, week, month, etc.

Preferably, I would like to see the individually collected numbers instead of averaged/mean/whatever numbers DPA shows as you zoom in/zoom out.

I figure I could get these out of the database?  However, I can't make sense out of the table structure/data model.