Entitásmodell

Entitásmodell is a term used in data modeling, particularly in the context of database design. It represents a logical structure for organizing and representing data. The core concept revolves around entities, which are real-world objects or concepts that can be uniquely identified. Examples of entities include customers, products, or orders.

Each entity is described by a set of attributes, which are properties or characteristics of that entity. For instance, a customer entity might have attributes like name, address, and email. Relationships define how different entities are connected to each other. A common relationship is "one-to-many," where one instance of an entity can be associated with multiple instances of another entity. For example, one customer can place many orders.

The process of creating an entitásmodell involves identifying the key entities, their attributes, and the relationships between them. This modeling process helps to ensure data consistency, integrity, and ease of access. It serves as a blueprint for database developers, outlining the structure of the information to be stored. Different types of entitásmodell exist, such as the relational model, which is widely used in relational databases, and other conceptual or logical models that precede the physical database implementation. The entitásmodell is a fundamental step in developing effective and well-organized data systems.