title: MySQL: Remove rows from a GROUP BY result if it only grouped 1 row
body: <p>When selecting data, I'm able to show how many rows were grouped from using <code>GROUP BY</code> by running:</p>
  
  <pre><code>SELECT id, created, COUNT(id) `count` FROM table
      GROUP BY id
      LIMIT 0,30
  </code></pre>
  
  <p>The <code>count</code> field easily outputs how many rows were affected by the <code>GROUP BY</code>. In MySQL is it possible to automatically <em>not</em> include any row which only has a <code>count</code> value of <code>1</code>?</p>