title: How to use the Django ORM to query only by date in a datetimefield
body: <p>I have a table with a DataTimeField.  I'd like to get a list of all the objects where the DateTimeField = a specific day (ignoring the time part).</p>
  
  <p>The SQL would look something like:</p>
  
  <pre><code>select * from tblname where date(start)='2011-01-14'
  </code></pre>
  
  <p>Is it possible to get the ORM to do this kind of query?</p>
  
  <p>I can do a start__range(...) kind of query, but I was wondering if I could do it the other way.</p>