I was selecting a large number of fields (*) and did not want to manually add an alias for each one.
I discovered that by using the Transformation tab to add a Rename by regex transformation, I could automatically remove the measurement and function name prefix, bms_ashp_control.mean_, from each field/series in the result set. I did not need to alias the fields in the query, or set the top-level Alias (to $col or otherwise).
