Ayuda php con limitacion

include_once('../conf.php');

$serial = md5($link);

$link_new = linkDetail($serial, unhtmlentities($title));
$link_new_data = isset($link_new_data) ? $link_new_data : linkDetail($data['info']['serial'], unhtmlentities($data['info']['title']));

        
		/*if(!$i) {
		  echo '<div id="joblistings" class="listings">';
		}*/
            if(!empty($title) && strpos($title, "job.jobtitle") === false ) {
                echo '<p><strong>Fuente</strong>: <span style="color: green">'.$fuente.'</span> ('.$sourceUrl.')</p>';
                    
                echo '<div><h2><a  href="'.$link_new.'">'.$title.'</a></h2>
                     <span class="datefield">'.$date.'</span> 
                     <p class="description"> '.strip_tags($description).'
                     </p></div>';
                
               
 // Aqui el limitador que no funciona
$query = mysql_query('SELECT codigo FROM '._table_.' WHERE `description` = \''.mysql_real_escape_string($serial).'\' LIMIT 1') or die(mysql_error());



                if(!mysql_num_rows($query)) {
                    //$qry = 'INSERT INTO `'._table_.'` VALUES(\''.mysql_real_escape_string($fileHandler).'\', \''.mysql_real_escape_string($title).'\', \''.mysql_real_escape_string('JoS' . $description).'\', \''.mysql_real_escape_string($link).'\', \''.mysql_real_escape_string($info['source_name']).'\', \''.mysql_real_escape_string($info['query']).'\', \''.mysql_real_escape_string($info['location']).'\', \''.mysql_real_escape_string($serial).'\', \''.time().'\') ';
                    $qry = 'INSERT INTO `'._table_.'` VALUES(\''.mysql_real_escape_string($fileHandler).'\', \''.mysql_real_escape_string($title).'\', \''.mysql_real_escape_string('JoS' . $description).'\', \''.mysql_real_escape_string($link).'\', \''.mysql_real_escape_string($info['source_name']).'\', \''.mysql_real_escape_string($query).'\', \''.mysql_real_escape_string($info['location']).'\', \''.mysql_real_escape_string($serial).'\', \''.time().'\', \''.mysql_real_escape_string($company).'\', \''.mysql_real_escape_string($city).'\', \''.mysql_real_escape_string($state).'\', \''.mysql_real_escape_string($formattedLocation).'\', \''.mysql_real_escape_string($latitude).'\', \''.mysql_real_escape_string($longitude).'\') ';
                    $result = @mysql_query($qry) or die(mysql_error());
                }
            }
            
            if(!empty($data['info']['title'])) {
                echo '<div><h2><a '.$extrade.' href="'.$link_new_data.'">'.$data['info']['title'].'</a></h2>
        		<span class="datefield">'.date('d/m/y', $data['info']['death']).'</span> 
                <p class="description" style="text-transform: lowercase"> '.strtolower($data['info']['description']).'
                </p></div>';
            }

LIMIT 0,100000

$query = mysql_query('SELECT codigo FROM '._table_.' WHERE `description` = \''.mysql_real_escape_string($serial).'\' LIMIT 1') or die(mysql_error());

$query = mysql_query('SELECT codigo FROM '._table_.' WHERE `description` = \''.mysql_real_escape_string($serial).'\' ORDER BY codigo DESC LIMIT LIMIT 0, 1000') or die(mysql_error());

$query = mysql_query('SELECT codigo FROM '._table_.' WHERE `description` = \''.mysql_real_escape_string($serial).'\' ORDER BY codigo DESC LIMIT 0, 1000') or die(mysql_error());