title: Mysql varchar sorting
body: <p>I have a filed <strong>parameter_value</strong> of type <strong>varchar</strong>. Even though it's type varchar, it stores integer,decimal and alphanumeric, special character values. I want to sort it by numerically.
  e.g.</p>
  <pre><code>0.001
  0.002
  3
  3.1
  4
  4.3
  4.9 and so on.
  </code></pre>