Define entity sets in dbms

entity is a thing in the real world with an independent existance. and entity set is collection or set all entities of a particular entity type at any point of time.

take an example:

a company have many employees ,and these employees are defined as entities(e1,e2,E3....) and all these entities having same attributes are defined under ENTITY TYPE employee.and set{e1,e2,.....} is called entity set.

we can also understand this by an anology .

entity type is like fruit which is a class .we havn't seen any "fruit"yet though we have seen instance of fruit like "Apple ,banana,mango etc.hence..

fruit=entity type=EMPLOYEE

Apple=entity=e1 or e2 or e3

enity set= bucket of Apple,banana ,mango etc={e1,e2......}