What is ER Modeling? Entity Relationship Modeling (ER Modeling) is a graphical approach to database design. It uses Entity/Relationship to represent real world objects. An Entity is a thing or object in real world that is distinguishable from surrounding environment. For example each employee of an organization is a separate entity. Following are some of major characteristics of entities. An entity has a set of properties. Entity properties can have values. In this tutorial, you will learn- What is ER Modeling? Enhanced Entity Relationship (EER) Model Why use ER Model? Entities in the "MyFlix" library Defining the relationships among entities Let's consider our first example again. An employee of an organization is an entity. If "Peter" is a programmer (an employee ) at Microsoft, he can have attributes ( properties) like name, age, weight, height, etc. It is obvious that those do hold values relevant to him. Each attribu...
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