title: Calculate year from date difference in Oracle
body: <p>I want to calculate the number of years between two dates.</p>
  
  <p>eg :- <code>Select to_date('30-OCT-2013') - TO_date('30-SEP-2014') FROM DUAL;</code></p>
  
  <p>This would result to 335 days. I want to show this in years, which will be <code>.97</code> years.</p>