How do you selectively sync a database in Django?
Basically write models that match what you want your destination tables to be and then write something to migrate data between the two. I'd make this a comment if I could but not enough rep.
Right now in Django, I have two databases: 

A default MySQL database for my app and
an external Oracle database that, for my purposes, is read-only

There are far more tables in the external database than I need data from, and also I would like to modify the db layout slightly. Is there a way I can selectively choose what data in the external database I would like to sync to my database? The external database is dynamic, and I would like my app to reflect that. 
Ex I would like to do something like this:
Say the external database has two tables (out of 100) as follows:
Table47

Eggs
Spam
Sausage

Table48

Name
Age
Color

And I want to keep the data like:
Foo

Eggs
Spam
Type (a foreign key)

Bar

Name
Age
Type (foreign key)

Type

Some fields

Is there a way I could do this in Django?