Learn what the N+1 problem is in Django, why it occurs with the ORM, how to detect it, and how to optimize queries using select_related and eager loading.

Learn how to use the orderByRaw function to get random records from your database, both with a direct relationship and a foreign one.

We will discuss the importance of optimizing queries in Laravel with real-world examples, seeing what works best for us: using with or join.

We are going to apply the filters defined before using the when and whereBetween, which is the predefined way in Laravel.

Eager loading and lazy loading are two techniques we have available to retrieve data related to working with Eloquent models. And we have to know them in detail to use techniques that best suit our needs.

We will see what polymorphic type relationships are and how to use them in Laravel, including one-to-one, one-to-many, and many-to-many relationships.