You can group by integer and string sets when building queries. Grouping by a set column will aggregate individual elements of sets across events in the query. Sets are assumed to be unordered and can be comprised of integers and strings.

Because event data can exist in multiple sets, the sum of the events of the set elements will be greater than the actual number of events.

To explain how Group By sets works, let's look at the following dataset where "fact" is a set of strings:

{"user_id": "mr_x", "time": "5/4/2016 8:00:00 AM", "fact": ["fact_a", "fact_b"], "action": "createFile"}
{"user_id": "mrs_y", "time": "5/4/2016 12:00:00 PM", "fact": ["fact_b", "fact_c", "fact_d"], "action": "createFile"}
{"user_id": "ms_z", "time": "5/4/2016 4:00:00 PM", "fact": ["fact_a", "fact_b", "fact_d"], "action": "createFile"}