title: Adding sub command sqlall to manage.py
body: <p>I am a beginner in web development using Django framework. While trying to work on mysql database .</p>
  
  <pre><code>python manage.py sqlall appname 
  </code></pre>
  
  <p>It gives out the following error</p>
  
  <pre><code>Unknown command: '--sqlall'
  Type 'manage.py help' for usage.
  </code></pre>
  
  <p>How to add a sub command sqlall to manage.py.(i'm not trying to implement it)?  </p>