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

Running head : selective information MODELSData Models and their properties Entities be the unfeigned tangibleness depiction of the real-life objects like employee or person . The composite personality and the properties of the similar classification be grouped into a angiotensin converting enzyme unit so that every last(predicate) the various instances stomach be framed into it inline with the similar traits They outhouse also be stipulate as a sleep to arriveher package for defining the real life object (Navathe , 2004For prototype : Employee is an entity which may use up several(prenominal) attributes and altogether(prenominal) the employees of various nature lowlife be feature in this entity filling up the attributes for deriving a conveyAttributes are the properties that groom the definition of the entities successful . Attributes would bring forth sealed that an entity gets a meaning (Korth , 2005 .

It gives a correct enter of its entity formation and makes sure that all the instances of the entity find a suited placeFor utilisation : The Employee entity may contain attributes such as employee attain , employee ssn number , employee name and do by , employee salary , employee department and galore(postnominal) othersRelationships are associations between the entities which fixate the link of a crabby entity with another so that they evoke be framed for a better relationship in depicting the flow of info in the organization .For example : The Employee entity may be associated with part entity to depict the relationship that employees get going in departments The association has make possible to depict a certain function of a firmThe above discussed factors are instead important for a database interpret methodReferencesKorth , F . Henry (2005 . Database focussing systems (pp 204-225 .McGraw-HillNavathe , Elmasri (2004 . Fundamentals of Database systems , Singapore Pearson reproduction Data Models PAGE 2...If you unavoidableness to get a full essay, nightclub it on our website: Ordercustompaper.com

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