title: Select random record from mnesia
body: <p>I have an mnesia table <code>t</code> that contains records with a single field <code>x</code>. How can I select a random value <code>x</code> from <code>t</code>?</p>
  
  <p>To avoid the entire of process of mathematical pedantry: I don't care about the details of the random number generation, I just want my result to generally not be the same every time.</p>
  
  <p>Thanks,
  <br/>-tjw</p>