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 pointion of the real-life objects like employee or psyche . The composite character and the properties of the similar classification ar separate into a virtuoso unit so that all the several(a) instances flush toilet be framed into it inline with the similar traits They raise also be learn as a get laid package for defining the real life object (Navathe , 2004For compositors grapheme : Employee is an entity which may contain some(prenominal) attributes and all the employees of various nature potful be have in this entity filling up the attributes for lineage a meaningAttributes are the properties that fall upon the definition of the entities successful . Attributes would make certain that an entity gets a meanin g (Korth , 2005 .

It gives a correct depiction of its entity formation and makes sure that all the instances of the entity find a fitting placeFor example : The Employee entity may contain attributes such as employee let out , 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 other so that they can be framed for a mitigate relationship in depicting the flow of data in the organization .For example : The Employee entity may be associated with Department entity to dep ict the relationship that employees survey ! in departments The association has made practicable to depict a certain function of a firmThe higher up discussed factors are quite a important for a database part methodReferencesKorth , F . Henry (2005 . Database concern systems (pp 204-225 .McGraw-HillNavathe , Elmasri (2004 . Fundamentals of Database systems , Singapore Pearson genteelness Data Models PAGE 2...If you urgency to get a safe essay, order it on our website: BestEssayCheap.com

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