how to use union and intersection in laravel query

1$queryWithParent = SaleService::query()
2    ->select(\DB::raw('DISTINCT ON (properties.parent_id) sale_services.*'))
3    ->from('sale_services')
4    ->join('properties', 'sale_services.property_id', '=', 'properties.id')
5    ->whereNotNull('properties.parent_id')
6    ->orderBy('properties.parent_id')
7    ->orderBy('sale_services.index_range', 'desc');
8
9$queryWithoutParent = SaleService::query()
10    ->select(\DB::raw('sale_services.*'))
11    ->join('properties', 'sale_services.property_id', '=', 'properties.id')
12    ->whereNull('properties.parent_id');
13
14$query = $queryWithParent->union($queryWithoutParent);