How to group by records in the list view for a table

I have a technical question if possible please. Let’s say i have a list page that contains clients, and I can join other tables with it, like services table joined with the clients table. How can I make a group by for the clients list page? I searched online and I couldn’t find any answer.

You can combine it with a view table, which contains the join table of the two tables. then reload it from the radsystems tool or you can create a view through the Database Views panel.