Currently, we have the option to build a business calculation to create ie. categories that could be specific to an ad hoc query. Unfortunately, at this moment there is no possibility to use them as a group by and aggregate data based on the business calculation.
This is limiting, as we need in such cases add these fields as dimensions in the datasets, and frequently there are very ad hoc and not relevant for anything else but one specific usecase. This is why it would be great to have an option to use business calculations also with aggregations.
(ie. creating a business calculation of two subgroups, and then count rows for this business calculation).