If you migrate very first time after making new project in Django, you can find that Django creates tables like below.
INSTALLED_APPS = [
This can be easily explained.
auth_user_groups auth_group_permissions auth_user_user_permissions
Are relational tables. Which are used to store info about how model tables are related.
auth_user_groups is storing how users and groups are related.
If you do
SELECT * FROM auth_user_groups; |id|user_id|group_id| ....
And here we can see that which groups are related to which users.
So basically django will automatically create such tables for when you use
ManyToManyField on your models
Django migration table is created automatically when you call
./manage.py migrate for the first time. This table stores history of applying your migrations. Migration model can be found in
django/db/migrations/recorder.py. This model is used when running new migrations to see which are applied and which should be applied on this command run. And this model is part of core django's functionality, that's why you don't need to add it in
INSTALLED_APPS contain only pluggable apps. Which you can include/exclude from your project if you want.