title: How to load .sql file with manage.py
body: <p>I have a .sql file from one of my production servers, and am now trying to load it into the database of another. I tried python manage.py loaddata, but its giving me an error </p>
  
  <pre><code>CommandError: Problem installing fixture 'social': sql is not a known serialization format.
  </code></pre>
  
  <p>How can I load my data into postgres from a .sql file with manage.py ?</p>