Entity Diagram Relationship. People customers or other objects relate to each other in an application or a database. Er diagrams are most often used to design or debug relational databases in the fields of software engineering business information systems education and research.
An entity relationship er diagram is a type of flowchart that illustrates how entities such as people objects or concepts relate to each other within a system. They are created when a new system is being designed so that the development team can understand how to structure the database. These entities can have attributes that define its properties.
The major entities within the system scope and the inter relationships among these entities.
Er diagram displays the relationships of entity sets. It was introduced in 1976 by p p chen and is known as er diagram e r model etc. Let us first see what it consists of. Any object such as entities attributes of an entity sets of relationship and other attributes of relationship can be characterized with the help of the er diagram.
