title: how to sort varchar numeric columns by DESC or ASC?
body: <p>I write ...     </p>
  
  <pre><code>ORDER BY column ASC
  </code></pre>
  
  <p>but my column is <code>VARCHAR</code> and it sorts wrong like <code>1, 10, 2</code>, instead of <code>1, 2, 10</code>.</p>
  
  <p>How can I do it to sort like <code>1, 2, 10</code>?</p>