---
title: "Facts and dimensions"
slug: "facts-and-dimensions"
abstract: "Overview of facts and dimensions."
---
# Facts and dimensions

Facts and dimensions are data warehousing terms. A fact is a quantitative piece of information - such as a sale or a download. Facts are stored in fact tables, and have a foreign key relationship with a number of dimension tables.

Dimensions are companions to facts, and describe the objects in a fact table. In the following example, every download fact is linked by ID to a number of dimensions:

![Dimensions linked to download facts](https://doc.sitecore.com/api/markdown-image/xp/en/developers/105/sitecore-experience-platform/images/fact-table1.png)