Differentiate Between Entities, Attributes, And Relationships In A Data Model

Running head : DATA MODELSData Models and their properties Entities be the unfeigned honesty depiction of the authoritative-life objects like employee or person . The composite spirit and the properties of the similar classification are grouped into a angiotensin converting enzyme unit so that every(prenominal) the various instances stomach be framed into it inline with the similar traits They erect also be subtend as a complete package for defining the real life object (Navathe , 2004For prototype : Employee is an entity which may ensure several(prenominal) attributes and each the employees of various nature can be feature in this entity filling up the attributes for deriving a marrowAttributes are the properties that come upon the definition of the entities successful . Attributes would make sealed that an entit y hurts a meaning (Korth , 2005 .

It gives a correct picture of its entity formation and makes sure that all the instances of the entity find a suitable placeFor fount : The Employee entity may contain attributes such as employee name , employee ssn number , employee name and grapple , employee salary , employee department and many othersRelationships are associations between the entities which compel the link of a particular entity with another so that they can be framed for a better relationship in depicting the flow of data in the organization .For example : The Employee entity may be associated with Department entity to depict the relationship that employees snuff it in de! partments The association has made possible to depict a certain function of a firmThe above discussed factors are quite a important for a database mapping methodReferencesKorth , F . Henry (2005 . Database centering systems (pp 204-225 .McGraw-HillNavathe , Elmasri (2004 . Fundamentals of Database systems , Singapore Pearson Education Data Models PAGE 2...If you unavoidableness to get a full essay, order it on our website: BestEssayCheap.com

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