In this chapter, you learned about ORM and ODM in general and how to use the main built-in methods to perform CRUD operations. You also learned about database transactions and ORM caching, and how to use PHQL or raw SQL queries.
In the next chapter, we will start developing our database architecture, and you will learn more about ORM. We will create forms and implement validations. We will also develop a CLI application to help us test our code faster.