Entity-Relationship Model
The Entity-Relationship Model (ER Model) is a way to visually represent and organize data in a system. It identifies "entities," which are objects or concepts (like "Customer" or "Order"), and defines their "attributes" (such as a customer's name or an order's date). The model also shows "relationships" between these entities, highlighting how they interact (like a customer placing an order). This framework helps in designing databases by illustrating how different pieces of information connect, making it easier to understand and manage data in various applications, from business to education.
Additional Insights
-
The entity-relationship model (ERM) is a way to visualize and organize information about various items, known as entities, and how they relate to one another. Think of it like a family tree or a map: entities can be people, places, or things, and relationships show how they interact. For example, in a school, students and teachers are entities, and the relationship might be "teaches" or "enrolls." This model helps in designing databases by clearly defining what data is needed and how it connects, making it easier to manage and retrieve information effectively.