Entity Relationship Model, also called an entity-relationship (ER) diagram, is a graphical representation of entities and their relationships to each other, typically used in computing in regard to the organization of data within databases or information systems. An entity is a piece of data-an object or concept about which data is stored.The ER model was first proposed by Peter Pin-Shan Chen of Massachusetts Institute of Technology in the 1970s.
Entity Relationship Model
