Difference between Django 2.0 and django 1.11

main.py

## Django 2.0

from django.urls import path

from . import views

urlpatterns = [
    path('articles/2003/', views.special_case_2003),
    path('articles/<int:year>/', views.year_archive),
    path('articles/<int:year>/<int:month>/', views.month_archive),
    path('articles/<int:year>/<int:month>/<slug:slug>/', views.article_detail),
]

# Django 1.11

urlpatterns = [
    url(r'^articles/2003/$', views.special_case_2003),
    url(r'^articles/([0-9]{4})/$', views.year_archive),
    url(r'^articles/([0-9]{4})/([0-9]{2})/$', views.month_archive),
    url(r'^articles/([0-9]{4})/([0-9]{2})/([0-9]+)/$', views.article_detail),
]


Regarding Database features

There are now new feautures like :

1) Aggregation with Filter 

django 2

from django.contrib.auth.models import User
from django.db.models import Count, F
User.objects.aggregate(
    total_users=Count('id'),
    total_active_users=Count('id', filter=F('is_active')),
)

django 1.11

from django.contrib.auth.models import User
from django.db.models import (
    Count,
    Sum,
    Case,
    When,
    Value,
    IntegerField,
)
User.objects.aggregate(
    total_users=Count('id'),
    total_active_users=Sum(Case(
        When(is_active=True, then=Value(1)),
        default=Value(0),
        output_field=IntegerField(),
    )),
)

And lot more DBMS features like , you refer here :
https://docs.djangoproject.com/en/2.0/ref/models/querysets/

Then there are new features to calculate rank like Windows function :
https://docs.djangoproject.com/en/2.0/ref/models/database-functions/#window-functions