title: How to get specific column from model in Django?
body: <p>How to get specific column from model in Django( SELECT city FROM advert ) and how to display the city repeated only once?(I have London x3)</p>
  
  <p>My model:</p>
  
  <pre><code>class Advert(models.Model):
  
      title = models.CharField(max_length=255)
      company = models.CharField(max_length=255)
      city = models.CharField(max_length=255)
  </code></pre>