title: Oracle DB insert and do nothing on duplicate key
body: <p>I have to insert some data in oracle DB, without previously checking if it already exist.</p>
  
  <p>Does exist any way, transiction on oracle to catch the exception inside the query and handle it to don't return any exception? </p>
  
  <p>It would be perfect something in mysql's style like</p>
  
  <pre><code>insert .... on duplicate key a=a
  </code></pre>