Question

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)

My model:

class Advert(models.Model):

    title = models.CharField(max_length=255)
    company = models.CharField(max_length=255)
    city = models.CharField(max_length=255)

Answer 1

Try

Advert.objects.values('city').distinct()

Or

Advert.objects.values_list('city', flat=True).distinct()

Also, Checking the doc is a must to take advantage of Django ORM QuerySet.