$register = DB::table('registrations')
            ->join('questions', 'registrations.registration_id', '=', 'questions.question_id')
             ->join('ssi_tracks','registrations.registration_id','=','ssi_tracks.registration_id')
             ->select('address', 'model', 'chassis', 'delivery_date','ssi_tracks.track_first_status')
            ->where([["questions.question_schedul", "=", $dropselected] and ['ssi_tracks.track_first_status',0]])
             ->get();