title: INT vs VARCHAR in search
body: <p>Which one of the following queries will be faster and more optimal (and why):</p>
  
  <ol>
  <li><p><code>SELECT * FROM items WHERE w = 320 AND h = 200</code> (w and h are INT)</p></li>
  <li><p><code>SELECT * FROM items WHERE dimensions = '320x200'</code>(dimensions is VARCHAR)</p></li>
  </ol>