How the database with Django works?
====================================
Django provided
	"Database Abstraction API" ==> we can perform any operations on the table.
	==> Create object
		Update object
		Delete object

==> To perform the database table operations, we need to use "python shell"
==> we need to start the python shell using:
	$ python manage.py shell
		==> open the python interactive shell
==> we should import the class which we created as model for database
	Syntax:
		from appName.models import Model(Class_name)
==> Before going enter objects into table:
	we should check whether any objects have created or not.
	Syntax:
		Model-Name.objects.all()
==> We need to add objects into the database table:
	Syntax:
		object-name = Model-Name(att1 = val1, att2 = val2, ...)
==> After the creation object into the table class, we need to save that object.
Syntax:
	object-name.save()
==> To get the row number or the identity of row in a table, we have two properties:
	id
	pk ==> primary Key
	Syntax:
		for id
			object-name.id
		for pk
			object-name.pk

==> To exit from the python shell:
	Syntax:
		exit()
===================================================================
Database Operations from Admin:
===============================
1) we need to create the admin user for our project.
	$ python manage.py createsuperuser
2) Enter User name
3) Enter Password 
4) Re-Enter Password
5) We should run the server:
	$ python manage.py runserver
6) open server URL in Browser
	and modify the url
http://127.0.0.1:8000===> http://127.0.0.1:8000/admin
7) In Admin login page:
	enter your credentials
	and click on login