title: Extracting a string from regular expression
body: <p>Using regular expressions, I want to extract the name2 from <code>name1_99_name2.sql</code></p>
  
  <ul>
  <li><code>name1</code> : any sequence of characters</li>
  <li><code>99</code> : any sequence of numbers</li>
  <li><code>name2</code> : any sequence of characters</li>
  </ul>
  
  <p>Using this: </p>
  
  <pre><code>\_[a-z]+  
  </code></pre>
  
  <p>I extract <code>name2</code> with the underscore before, but I need it without it.</p>
  
  <p>Any idea? </p>