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Database Refreshment Contest 3
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?
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Re: Database Refreshment Contest 3
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. |
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