Не работает SQL-запрос из нескольких таблиц

include_once "Blocks/bd.php";
if (isset($_GET['r_name'])) {$r_name=$_GET['r_name'];}
if (isset($_GET['c_name'])) {$c_name=$_GET['c_name'];}

< 
$result=mysql_query('SELECT id,date,title,description,d_time FROM articles,rubrics,categories WHERE r_id = rub_id AND c_id = cat_id AND r_name = "$r_name" AND c_name = "$c_name"  ORDER BY date DESC',$db) OR die("Query failed with error: ".mysql_error());       
if (!$result)
       {           
          printf(
    "<tr>
    <td>
    <p>Новостей на сегодня нет</p>
    </td>
    <td>&nbsp;</td>
    </tr>"
    );
    exit();    
           }
else {  $myrow=mysql_fetch_array($result) OR die("Query failed with error: ".mysql_error());
print_r($myrow);      //array   
do {      
printf (
  "<tr>
      <td width='150px'><a href='View.php?id=%s''><img src='/upload/image/%s/cover.jpg' alt='%s' title='%s'></a></td>
    <td>
    <p>%s <a href='View.php?id=%s'>%s</a></p>
    <p>%s</p>
    </td>
  </tr>",$myrow["id"],$myrow["id"],$myrow["title"],$myrow["title"],$myrow["date"],$myrow["id"],$myrow["title"],$myrow["description"]
  );
 }
 while ($myrow=mysql_fetch_array($result));
}
 mysql_close($db);

OR die("Query failed with error: ".mysql_error());

Query failed with error:

if(isset($_GET['r_name'])) {$r_name=urldecode($_GET['r_name']);}
if (isset($_GET['c_name'])) {$c_name=urldecode($_GET['c_name']);}

$result=mysql_query('SELECT `id`, `date`, `title`, `description`, `d_time` FROM `articles`, `rubrics`, `categories` WHERE `r_id` = `rub_id` AND `c_id` = `cat_id` AND `r_name` = "$r_name" AND `c_name` = "$c_name"  ORDER BY `date` DESC',$db)
 OR die ("Query failed with error: ".mysql_error());

$result=mysql_query('SELECT id,date,title,description,d_time FROM articles,rubrics,categories WHERE r_id = rub_id AND c_id = cat_id AND r_name = "$r_name" AND c_name = "$c_name"  ORDER BY date DESC',$db) OR die("Query failed with error: ".mysql_error()); 
echo mysql_num_rows( $result );

'SELECT id,date,title,description,d_time FROM articles,rubrics,categories WHERE r_id = rub_id AND c_id = cat_id AND r_name = "$r_name" AND c_name = "$c_name"  ORDER BY date DESC'

"SELECT id,date,title,description,d_time FROM articles,rubrics,categories WHERE r_id = rub_id AND c_id = cat_id AND r_name = '$r_name' AND c_name = '$c_name'  ORDER BY date DESC"

'SELECT id,date,title,description,d_time FROM articles,rubrics,categories WHERE r_id = rub_id AND c_id = cat_id AND r_name = "'.$r_name.'" AND c_name = "'.$c_name.'"  ORDER BY date DESC'

r_name=%D0%EE%F1%F1%E8%FF&c_name=%CF%F0%EE%E8%F1%F8%E5%F1%F2%E2%E8%FF

echo"$c_name  $r_name";

Array ( [r_name] => Россия [c_name] => Политика )

echo"$c_name  $r_name";

register_globals=1

register_globals = On