---
title: "Models and databases"
version: dev
locale: en
source: https://docs.djangoproject.com/en/dev/topics/db/
canonical: https://djangodocs.dev/en/dev/topics/db/
---
# Models and databases

A model is the single, definitive source of information about your data. It
contains the essential fields and behaviors of the data you’re storing.
Generally, each model maps to a single database table.

- [Models](/en/dev/topics/db/models/)
- [Making queries](/en/dev/topics/db/queries/)
- [Fetch modes](/en/dev/topics/db/fetch-modes/)
- [Aggregation](/en/dev/topics/db/aggregation/)
- [Search](/en/dev/topics/db/search/)
- [Managers](/en/dev/topics/db/managers/)
- [Performing raw SQL queries](/en/dev/topics/db/sql/)
- [Database transactions](/en/dev/topics/db/transactions/)
- [Multiple databases](/en/dev/topics/db/multi-db/)
- [Tablespaces](/en/dev/topics/db/tablespaces/)
- [Database access optimization](/en/dev/topics/db/optimization/)
- [Database instrumentation](/en/dev/topics/db/instrumentation/)
- [Fixtures](/en/dev/topics/db/fixtures/)
- [Examples of model relationship API usage](/en/dev/topics/db/examples/)