In this section, we will step through the types of tables in Drupal core and what their purposes are. The content of the pages are based on this post: http://posulliv.github.io/2012/08/02/drupal-er-diagram/

Overview

When you install Drupal, 74 tables will be created in your database. Below is an entity diagram with the tables grouped based on purpose. In the following pages of this article, we will discuss each of these sections.

Entity diagram