title: How do I extract a substring starting from end of string until the second 0 is encountered, oracle?
body: <p>I have a table <code>client_requests</code> with the column <code>number_request</code>.
  In the column <code>number_request</code> I have the following records:</p>
  
  <pre><code>20130000000008,
  20130000000010,
  20130000000503
  </code></pre>
  
  <p>I want to extract only the end of string without 0, </p>
  
  <p>example:</p>
  
  <pre><code>for 20130000000008 I want to get 8
  for 20130000000010 I want to get 10
  for 20130000000503 I want to get 503
  </code></pre>
  
  <p>I think I need to use <code>regexp_substr</code> but do not know how.</p>