$c=DB::table('examination_records as a') ->join('medical_institution as b', 'a.institution_id', '=', 'b.id')
->select(['a.id','a.institution_id','a.id_card_num','a.tijian_num','a.tijian_time','a.created_at as insertime','b.org_name'])->where([['a.id_card_num','=',$id_num],['a.fee_type','=',0],['a.created_at','>=',$firstDay],['a.created_at','<=',$lastDay]])->get();
->select(['a.id','a.institution_id','a.id_card_num','a.tijian_num','a.tijian_time','a.created_at as insertime','b.org_name'])->where([['a.id_card_num','=',$id_num],['a.created_at','>=',$firstDay],['a.created_at','<=',$lastDay]])->get();