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

Running head : DATA MODELSData Models and their properties Entities atomic number 18 the literal public tieion of the real-life objects like employee or somebody . The composite character and the properties of the similar classification be assort into a virtuoso unit so that all the unhomogeneous instances flush toilet be framed into it inline with the similar traits They lav also be learn as a completed package for defining the real life object (Navathe , 2004For compositors subject area : Employee is an entity which may contain some(prenominal) attributes and all the employees of various nature throne be have in this entity filling up the attributes for derivation a meaningAttributes are the properties that flip the definition of the entities successful . Attributes would make certain that an entity gets a meani ng (Korth , 2005 .

It gives a correct submit of its entity formation and makes sure that all the instances of the entity find a fitted placeFor example : The Employee entity may contain attributes such as employee differentiate , employee ssn number , employee channelize , employee salary , employee department and many othersRelationships are associations between the entities which define the link of a particular entity with another(prenominal) so that they can be framed for a bump 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 surv! ey in departments The association has made mathematical to depict a certain function of a firmThe higher up discussed factors are quite a important for a database office methodReferencesKorth , F . Henry (2005 . Database concern systems (pp 204-225 .McGraw-HillNavathe , Elmasri (2004 . Fundamentals of Database systems , Singapore Pearson rearing Data Models PAGE 2...If you urgency to get a replete essay, order it on our website: OrderCustomPaper.com

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