title: Cross Filter - Filter on Groups (Top N groups)
body: <p>I personally found cross filter very powerful as it re calculates on the fly filters which are done on dimensions. However, is it possible to achieve something  similar to the <strong>HAVING</strong> clause in SQL via crossfilter, out of the box? Or should this be done manually?</p>
  
  <p>I have already achieved the following:</p>
  
  <pre><code>          Total Points
  Team A0      100
  Team A1      50
  Team A2      120
  Team A3      10
  </code></pre>
  
  <p>I would like to show in a dc.js visualisation the TOP 3 teams only. The above groups should then be recalculated when I filter on another dimension (e.g. date), such that different teams show up on the visualisation.</p>