title: How to sort vertices by edge count in OrientDB
body: <p>I want to do this but it doesn't work: </p>
  
  <pre><code>select * FROM Users ORDER BY in.size() 
  </code></pre>
  
  <p>I have also tried: </p>
  
  <pre><code>select * from Users ORDER BY in[label='connection'].size()
  select * from Users ORDER BY inE['connection'].size()
  </code></pre>
  
  <p>it just returns all V's but not sorted</p>