我在做 MySQL 链接时，修改的时候报的错？

Warning: mysql_fetch_array() expects parameter 1 to be resource, boolean given inD:\phpstudy\WWW\news\editnews.phpon line17

这是代码

<?php

require "dbconfig.php";

$link = @mysql_connect('localhost','root','root') or die("提示：数据库连接失败！");

mysql_select_db('dbname',$link);

mysql_set_charset('utf8',$link);

$id = $_GET['id'];

$sql = mysql_query("SELECT * FROM news WHERE id=$id",$link);

$sql_arr = mysql_fetch_array($sql);

?>