code: def data(request):
      
      columns = [
          ColumnDT(User.id),
          ColumnDT(User.name),
          ColumnDT(Address.description),
          ColumnDT(func.strftime("%d-%m-%Y", User.birthday)),
          ColumnDT(User.age)
      ]
  
      query = DBSession.query().select_from(User).join(Address).filter(
          Address.id > 4)
  
      rowTable = DataTables(request.GET, query, columns)
  
      return rowTable.output_result()
docs: Return server side data.