title: order by not formatted date sqlite
body: <p>I'm storing Dates as string in the database with this format DD-MM-YYYY.</p>
  
  <p>When I tried to make a select query with an orderby on the date column. I didn't get the expected result.</p>
  
  <p>example of result : 
  28/02/2013
  27/02/2013
  01/03/2013</p>
  
  <p>My sql query : </p>
  
  <pre><code>SELECT * FROM data ORDER BY strftime('%s', date_column)
  </code></pre>
  
  <p>Thank you.</p>