This article revolves around how can you change your default Django SQLite-server to PostgreSQL. PostgreSQL and SQLite are the most widely used RDBMS relational database management systems. They are both open-source and free. There are  some major differences that you should be consider when you are choosing a database for your applications.

Also checkout - Difference between SQLite and PostgreSQL

Setting up PostgreSQL in Django 

First create a virtual env so to do that first install virtualenv using this command

pip install virtualenv

then we will create a virtualenv named gfg using 

virtualenv gfg

to enter in the virtual environment create use 

now we will install Django here so I am using Django 2.2 

pip install django==2.2.*

To get Python working with Postgres, you will need to install the “psycopg2” module.

pip install psycopg2

now lets create a django project named geeks

django-admin startproject geeks

to check your django is running smoothly 

python manage.py runserver

Now, go to the below link and download and set up PostgreSQL. create a database name gfg in your Postgres server. Now its time to switch from SQLite to PostgreSQL.

Folder structure -

open the settings.py file 

now change database settings with this template code

DATABASES = {
   'default': {
       'ENGINE': 'django.db.backends.postgresql',
       'NAME': ‘<database_name>’,
       'USER': '<database_username>',
       'PASSWORD': '<password>',
       'HOST': '<database_hostname_or_ip>',
       'PORT': '<database_port>',
   }
}

Run these commands 

python manage.py makemigrations
python manage.py migrate

now lets create the default superuser:

 python manage.py createsuperuser

now again run your server with 

python manage.py runserver

go to this route and add the credential you did while creating superuser

http://127.0.0.1:8000/admin/

and if you are successfully able to log in, you have successfully switched to PostgreSQL