title: mysql JOIN not select the answers if there is no votes
body: <p>see this code</p>
  
  <pre><code>SELECT x.*, z.rates 
  FROM poll_answers x
    JOIN 
      (SELECT answer_id, COUNT( id ) AS `rates`
       FROM poll_votes 
       GROUP BY answer_id) z 
    ON 
      x.id = z.answer_id
  WHERE x.poll_id = '$poll_id' 
  ORDER BY x.id DESC
  </code></pre>
  
  <p>it just show the answer is it has more then 0 votes, this mean if my poll is new and there is not votes it will never show the answers</p>
  
  <p>so the question how to update this code to show the answers if has no vots too</p>