/docs/topics/db/index.txt

 1Models and databases
 2====================
 3
 4.. module:: django.db
 5
 6A model is the single, definitive source of data about your data. It contains
 7the essential fields and behaviors of the data you're storing. Generally, each
 8model maps to a single database table.
 9
10.. toctree::
11   :maxdepth: 1
12
13   models
14   queries
15   aggregation
16   managers
17   sql
18   transactions
19   multi-db
20   optimization