django_orm_example.py

# in users app i added this model
class User(models.Model):
    name = models.CharField(max_length=10)
    
# in django shell execute the following
from users.models import *

# the object will hold all the logic
new_user = User(name='Yasser')
# this will execute an INSERT
new_user.save()
new_user.name = 'Yasser 2'

# this will execute an UPDATE
new_user.save()

# for retrieving data we have to use objects property (https://docs.djangoproject.com/en/2.1/topics/db/managers/) 
User.objects.first() # <User: User object>