• Entity is the fundamental item in any data model.
  • An entity is a ‘thing’ or ‘object’ in a real world that can be distinguished from all other objects.
    eg:- car, table, book, etc.
  • An entity need not be a physical entity, it can also represent a concept in real world.
    eg:- project, loan, etc.
  • It represents a class of things, not any one instance.
Entity Set or Entity Type
A collection of a similar kind of entities is called an Entity Set or Entity Type.