ER Model vs UML diagram

     ER model What is the ER model? The full-form of ER model is Entity-Relationship model. It is a model which is used to describe the relationship between data-elements in a database  system. This ER model is generally portrayed using an ER diagram. It is widely used in various organizations as it is really simple and easy to understand, with just a glance a person can understand each and every aspect of the backend architecture. Components of ER model Entity: An entity can be anything ranging from a person, place or object. It is generally represented using a rectangle. For example, faculty, student, department, college all can be termed as entities. Weak Entity : An entity which depends on another entity is called a weak entity. It                represented with double-rectangle and does not have a key attribute of its own Attribute: The attribute is used to describe the property of an attribute. It is described using...