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

Running head : DATA MODELSData Models and their properties Entities be the unfeigned reality depiction of the real-life objects like employee or person . The composite reputation and the properties of the similar classification are grouped into a angiotensin converting enzyme unit so that all the various instances stomach be framed into it inline with the similar traits They can also be delimitate as a complete package for defining the real life object (Navathe , 2004For prototype : Employee is an entity which may contain several(prenominal) attributes and all the employees of various nature can be feature in this entity filling up the attributes for deriving a meaningAttributes are the properties that make the definition of the entities successful . Attributes would make sealed that an entity gets a meaning (Korth , 2005 .

It gives a correct picture of its entity formation and makes sure that all the instances of the entity find a suitable placeFor example : The Employee entity may contain attributes such as employee name , employee ssn number , employee name and address , employee salary , employee department and many othersRelationships are associations between the entities which fasten the link of a particular entity with another so that they can be framed for a better 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 rifle in departments The association has made possible to depict a certain function of a firmThe above discussed factors are rather important for a database mapping methodReferencesKorth , F . Henry (2005 . Database guidance systems (pp 204-225 .McGraw-HillNavathe , Elmasri (2004 . Fundamentals of Database systems , Singapore Pearson Education Data Models PAGE 2...If you unavoidableness to get a full essay, order it on our website: Orderessay

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