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 grouped into a virtuoso unit so that all the confused instances flush toilet be framed into it inline with the similar traits They pot also be learn as a be intimate package for defining the real life object (Navathe , 2004For compositors representative : Employee is an entity which may contain some(prenominal) attributes and all the employees of various nature bottom of the inning be have in this entity filling up the attributes for derivation a meaningAttributes are the properties that learn the definition of the entities successful . Attributes would make certain that an enti ty gets a meaning (Korth , 2005 .

It gives a correct belief of its entity formation and makes sure that all the instances of the entity find a competent placeFor example : The Employee entity may contain attributes such as employee soma , 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 Dep artment entity to depict the relationship th! at employees survey in departments The association has made realistic to depict a certain function of a firmThe supra discussed factors are quite a important for a database procedure methodReferencesKorth , F . Henry (2005 . Database concern systems (pp 204-225 .McGraw-HillNavathe , Elmasri (2004 . Fundamentals of Database systems , Singapore Pearson cultivation Data Models PAGE 2...If you urgency to get a honorable essay, order it on our website: BestEssayCheap.com

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