Database Refreshment Contest 3

[vjsreevs]

1) What is an Entity?
2) What is an Entity type?
3) What is an Entity set?
4) What is an Extension of entity type?
5) What is an attribute?

[rk_ramakrishnamca]

1.An existing thing in the real world is called entity
Ex:Humanbeing,fan,book....etc.
2.An entity type which specifies the type of the entities.
Ex: entitytype is "Employes"={e1,e2,e3.....} where e1,e2,e3... are the number of employes.
3.An entity set which contains the some entities.
Ex: Entityset={humanbeing, fan, Book....}
5. The things which are belongs to the particular entity is called as an attribute.
Ex:Head , legs ,Hands are the some of the attributes of the humanbeing.


Brilliant people don't do the different things , they can do the things
differently.