title: How to extract numbers from a text field in MySQL
body: <p>I have a column in MySQL table which has phone numbers, but in unclean format i.e. there are double quotes, dashes and brackets, 
  for ex: </p>
  
  <pre><code>[ "-", "7736562159" ]
  [ "8177985242", "-" ]
  </code></pre>
  
  <p>I want to extract only the 'phone number'  part from this string. Is there any mysql function to do it?</p>