Here's a report I used to see requests for in terms of being able to filter an availability report. Due to the aggregate function that Orion is doing, a filter in the Where clause will not work. As such an Advanced SQL report is needed to put in a Having Clause to specify the availability filter. This report displays any node that had 90% or less availability over the last month. It's easily altered for different values by changing the number in the having clause.
Enjoy,
Matthew Harvey
Loop1 Systems