How we add new column in django

How we add new column in django :-

to add new column or filed in django after creating table we should manage following steps

1)  go into model.py and add field if filed is CharacterField then write

models.CharField(max_length=100, default='')

if field is DateTime then write following 
code 
models.DateTimeField(auto_now=True)

2)  python manage.py makemigrations appname

3) python manage.py sqlmigrate appname newmigrationfilename     (example if 0004 then you write python manage.py sqlmigrate appname 0004)


4)  python manage.py migrate