title: Show datediff as seconds, milliseconds
body: <p>I'm trying to calculate the difference between two datetime values.</p>
  
  <p>I tried <code>datediff(s, begin,end)</code> and <code>datediff(ms, begin,end)</code> however I want the difference to be returned as <code>seconds,milliseconds</code> like the following:</p>
  
  <pre><code>4,14
  63,54
  </code></pre>