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 visualiseion of the real-life objects like employee or somebody . The composite character and the properties of the similar classification ar grouped into a virtuoso unit so that all the respective(a) instances flush toilet be framed into it inline with the similar traits They bear also be learn as a round out package for defining the real life object (Navathe , 2004For compositors suit of clothes : Employee is an entity which may contain some(prenominal) attributes and all the employees of various nature cigarette be have in this entity filling up the attributes for etymologizing a meaningAttributes are the properties that bring in the definition of the entities successful . Attributes would make certain that a n entity gets a meaning (Korth , 2005 .

It gives a correct film of its entity formation and makes sure that all the instances of the entity find a suited placeFor example : The Employee entity may contain attributes such as employee attain , 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 some other so that they can be framed for a give out 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 survey in d! epartments The association has made accomplishable 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 fosterage Data Models PAGE 2...If you urgency to get a teeming essay, order it on our website: BestEssayCheap.com

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