字段自身+1 SQL语句

include("config.php");
   
   $id=635;
                     $sql_sss8 = "UPDATE data_type_brand SET brand=brand+1 WHERE id='$id'";
                     $ddd=mysqli_query($conn, $sql_sss8);  
                     if($ddd){
                        echo "成功";
                     }else{
                        echo "失败";
                     }

$sql="update set table1 set num=num+1 where id='123(文章ID)';"