To implement a database we need a blueprint and we can create this blueprint using Entity-Relationship or ER diagram. The Entity-Relationship diagram describes the structure of a database. As its name indicates, the Entity-Relationship diagram shows the relationship between different entities or entity sets of the database. An entity is the object or component of the data and is represented by a rectangle in the Entity-Relationship diagram. similarly, we have different shapes to represent different components of the data. For instance, an attribute is represented by an oval. In this tutorial, we will be discussing in brief the various components involved in a database and Entity relationship diagram. It is a core part of the Database Management system. To know more about this interesting topic, watch the video till the end.