This tutorial teaches how to perform the Update and Delete functions of CRUD for an app.

The first two parts of the tutorial cover Create and Read functions. The tutorial starts by improving some existing code before moving on to updating and deleting data from a database. The tutorial also explains how to navigate to a single fact on a page with its own URL and how to create an Edit form where users can update facts. The author also explains how to set up a 404 page and improve the user experience.