这样写的sql哪里有问题呢

<?php $con=mysql_connect('localhost','root','root');//数据库信息mysql_select_db("phpcmsutf8test",$con);//数据库名mysql_query("set names utf8");//设置字符集编码$catidd=$_GET['catid'];echo $catidd;$sql = mysql_query("SELECT jh_comment.title, jh_comment.total, jh_comment.square FROM jh_comment INNER JOIN jh_video ON jh_comment.title = jh_video.title WHERE jh_video.catid = $catidd");$arr = array();while($row = mysql_fetch_assoc($sql,$con)){		$arr[]= $row;	}if($arr[0]['total']!=0){	$comtotal=$arr[0]['total']; 	$comsqu=$arr[0]['square']; 	$hlu=($comsqu/$comtotal)*100;	$hlu=sprintf("%.1f",$hlu).'%';			echo "\$('.comment_lu').html('$hlu');";/	echo "\$('#comment_total').html('$comtotal');";?>