Data base design and analysis | Design and analysis



The Red Star Instance (RSC) is “Car Phsingle Holder” manufacturing posse that has three factories in irrelative cities. 

These factories are legal restraint and making irrelative Car Phsingle Holders.  A peculiar Phsingle Holder manufacturing regularity (restraint issue, Car Phsingle Holder restraint Toyota Corolla) is regularly inferior the repress of true single factory.

RSC Employees composition in three manufacturing factories and each employee compositions in barely single factory. The employee lives in the corresponding city. Perfect national manufacturing factory is controld by an employee who compositions in the corresponding plant; except perfect employee is referable a factory supervisor, nor can an employee control more than single place.  Each and perfect national factory must entertain a supervisor.  Some employees are assigned to composition on projects (irrelative Car Phsingle Holder) and in some instances influence well-balanced be assigned to composition on unconnected projects unitedly.  Some of the employees to-boot inspect other employees except every employees scarcity referable be inspectd – the employees that are inspectd, are inspectd by true single employee.

QUESTION 1: Develop the Presentation Layer ER Diagram restraint RSC instance. Draw a Chen’s referableation ER diagram that shows the existence models and analogy models. You can authentication


Yu are fond ER Diagram restraint Airports basisbase. Assume that basis are maintained on airports environing the dominion restraint a posse that offers a soaring chartering labor restraint seed-plot teams. They supplement instruction from a extensive miscellany of sources, except entertain had extensive inaptitude in the elapsed obtaining basis on runway surfaces at airports located in smevery seed-plot towns. Posse pilots scarcity avenue to this instruction when they must place either at airports such as these or in intermittent emergencies, when they must place at other smevery airports that are referable located in seed-plot towns.

As a fruit, as shown here, they entertain created a RUNWAY_SURFACE existence model unconnected from a RUNWAY existence model.


Answers the questions below

Question 2: Identify each existence, earliest solution(s) and (if there is) the restrainteign solution (s) 

Question  3 : Explain the analogy incompact the entities

Question 4 : What is the aim of having RUNWAY_SURFACE existence

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