php分页问题

Question

<?php
@$page = $_GET['p'];
include("conn.php");
$sql= "SELECT * FROM page LIMIT " .($page-1)*10 .",10";
$result = mysql_query($sql);
while($row = mysql_fetch_assoc($result)){
   echo $row["lids"];
}
mysql_free_result($result);
mysql_close($conn);

报错如下：

Warning: mysql_fetch_assoc() expects parameter 1 to be resource, boolean given in E:\wamp\www\IdeaProjects\LyitOA\GoodTest\a.php on line 6 Call Stack

Warning: mysql_free_result() expects parameter 1 to be resource, boolean given in E:\wamp\www\IdeaProjects\LyitOA\GoodTest\a.php on line 9

请问如何解决？谢谢