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)';"