title: OrientDB group by
body: <p>I developing a traffic counter and I want to get IP and repeat count, but how ?</p>
  
  <p>Something like : 
  <code>select ip, count(ip) from Redirect</code></p>
  
  <p>Return : 
  <code>
  null total ip count
  </code></p>
  
  <p>Redirect is a bean which have 2 fields : ip, date</p>