Hi John

The report builder is capable of limited grouping and aggregation as described in https://help.totaralearning.com/display/TL9/Creating+Reports

The report builder is being looked at in short term horizon (July 2017 - Oct 2017 to make aggregation and graphing easier https://help.totaralearning.com/display/TPD/Totara+Learn+Roadmap#TotaraLearnRoadmap-Futureareasoffocus

regards