title: Query to get only numbers from a string
body: <p>I have data like this:</p>
  
  <pre><code>string 1: 003Preliminary Examination Plan   
  string 2: Coordination005  
  string 3: Balance1000sheet
  </code></pre>
  
  <p>The output I expect is </p>
  
  <pre><code>string 1: 003
  string 2: 005
  string 3: 1000
  </code></pre>
  
  <p>And I want to implement it in SQL.</p>