请问 Laravel 里 MongoDB 多字段分组查询，如何查出每个组里某个字段的最大值？DB::raw ('MAX (totalMileage) as max_totalMileage') 不起作用

 $result = DB::connection('mongodb')
            ->collection('tbox')
            ->select('vin', 'updateDataDate',"totalMileage",DB::connection('mongodb')->collection('tbox')->raw('MAX(totalMileage) as max_totalMileage'))
            //->groupBy('vin')
            ->where("updateDataTime",">=","2020-06-28 00:00:00")
            //->where("vin","=",'LVM6A1G10JF068481')
           ->groupBy("vin", "updateDataDate")
            ->get();

DB::raw(‘MAX(totalMileage) as max_totalMileage’)不起作用，得到的结果是：