Why can't PHP modified data be synchronized to the database, but the current page is modified successfully?

Question

接口：

public function updateRole($f_name,$u_name,$r_name,$i_name){
   $res = Db::table("fa_waem_instrument_info")
       ->field('fa_dms_room.r_name,info.i_name,fa_dms_unit.u_name,info.i_type,fa_dms_floor.f_name')
       ->alias('info')
       ->join('fa_dms_room ', 'info.room_id = fa_dms_room.id ')
       ->join('fa_dms_unit ', ' fa_dms_room.id = fa_dms_unit.id')
       ->join('fa_dms_floor &#

Answer 1

update(['r_name'=> $r_name,'f_name'=>$f_name,'u_name'=>$u_name,'i_name'=>$i_name]); 多了一个“ ”号