title: how can I turn column into rows in presto?
body: <p>I want to turn column into a new rows and save the values.</p>
  <p>For example:</p>
  <p>BEFORE</p>
  <pre><code>NAME  COMDEDY  HORROR  ROMANCE
  brian    10     20     14
  tom      20     10     11
  </code></pre>
  <p>AFTER</p>
  <pre><code>NAME    GANRE    RATING
  brian   comedy     10
  brian   horror     20
  brian   romance    14
  tom     comedy     20
  tom     horror     10
  tom     romance    11
  </code></pre>
  <p>I need to do this at least with python pandas ,if I can't do it with prestodb</p>