title: Multiple level ordering in Yii
body: <p>This is my CActiveDataProvider </p>
  
  <pre><code>$dataProvider = new CActiveDataProvider ('MyTable', array ( 
              'pagination' =&gt; array ( 
                      'PageSize' =&gt; 4, 
                  ),
              'criteria' =&gt; array ( 
                      'condition' =&gt; 'from_user_id='.$user-&gt;id,
                      'order' =&gt; 'date DESC', 
                  ), 
              ));
  </code></pre>
  
  <p>My question is: I would like to have this CActiveDataProvider ordered <strong>first</strong> by date (as the posted code does), and in a second level, within those with the same date, order by a second criteria. Is this possible?</p>