CRUD

CRUD is an acronym that stands for Create, Read, Update, and Delete. These are the four fundamental operations that are performed on data in any persistent storage system, such as a database. The concept of CRUD is central to the design of RESTful APIs, where these operations are mapped directly to standard HTTP methods. Create corresponds to the `POST` method. When a client wants to create a new resource on the server (e.g., create a new user or post a new blog article), it sends a `POST` request to a collection endpoint (e.g., `/users` or `/articles`). The data for the new resource is included in the request body. Read corresponds to the `GET` method. This is used to retrieve a resource or a collection of resources. A `GET` request to a collection endpoint like `/users` would retrieve a list of all users, while a `GET` request to a specific resource endpoint like `/users/123` would retrieve the details of the user with ID 123. Update corresponds to the `PUT` or `PATCH` methods. `PUT` is typically used to replace an entire resource with a new version, while `PATCH` is used for partial updates. For example, a client would send a `PUT` or `PATCH` request to `/users/123` to update that user's information. Delete corresponds to the `DELETE` method. As the name implies, it's used to remove a resource. A `DELETE` request to `/users/123` would delete that user from the system. This mapping provides a standardized and intuitive way to interact with an API.