So far, we have implemented capabilities related to basic features of the application. From now on, we will start implementing the application's core features, starting with static data management. What exactly is this? Every application has information that is not directly related to the core business, but this information is used by the core business logic somehow.

There are two types of data in every application: static data and dynamic data. For example, the types of categories, languages, cities, and countries can exist independently of the core business and can be used by the core business information as well; this is what we call static data because it does not change very often. And there is the dynamic data, which is the information that changes in the application, what we call core business data. Clients, orders, and sales would be examples of dynamic or core business data.

We can treat this static information as though they are independent MySQL...