Determine candidate and primary key, Database Management System

Assignment Help:
  • A video rental company has several branches.
  • The data held on each branch is the branch address made up of street, city, state, and zip code, and the telephone number.
  • Each branch is given a branch number, which is unique. Each branch is allocated staff, which includes a Manager. The Manager is responsible for the day-to-day running of a given branch.
  • The data held on a member of staff is his or her name, position, and salary. Each member of staff is given a staff number, which is unique.
  • Each branch has a stock of videos. The data held on a video is the catalog number, video number, title, category, daily rental, cost, status, and the names of the main actors, and the director. The catalog number uniquely identifies each video. However, in most cases, there are several copies of each video at a branch, and the individual copies are identified using the video number.
  • A video is given a category such as Action, Adult, Children, Drama, Horror, or Sci-Fi. The status indicates whether a specific copy of a video is available for rent.
  • Before hiring a video, a customer must first register as a member. The data held on a member is the first and last name, address, and the date that the member registered at a branch.
  • Each member is given a member number, which is unique. Once registered, a member is free to rent videos, up to maximum of ten at any one time.
  • The data held on each video rented is the rental number, the name and number of the member, the video number, title, and daily rental, and the dates the video is rented out and date returned. The rental number is unique.

(a)   Identify the main entity types of the company.

(b) Identify the main relationship types between the entity types and determine the multiplicity constraints for each relationship

(c)   Identify attributes and associate them with entity or relationship types.

(d)  Determine candidate and primary key attributes for each (strong) entity type.

(e)  Using your answers (a) to (d) create a single ER diagram. State any assumptions necessary to support your design.


Related Discussions:- Determine candidate and primary key

State the object design for processing, State the Object Design for Process...

State the Object Design for Processing  The object design phase comes after analysis and system design phase. The object design phase includes implementation details like as i

Determine Which is not a consequence of concurrent operation, Determine Whi...

Determine Which is not a consequence of concurrent operations? Ans: Update anomaly.

Issues relating to the design of the physical database files, The issues re...

The issues relating to the Design of the Physical Database Files Physical File is a file as stored on the disk. The major issues relating to physical files are:  •      Cons

Explain the process-oriented decomposition, Breaking into Subsystems D...

Breaking into Subsystems Decomposition is a significant technique for coping with complexity based on idea of divide and conquers. In dividing a problem into sub problems, the

Recovery management component, Ask question #Minim 100 words accepted#what ...

Ask question #Minim 100 words accepted#what is recovery management component in database management system and how it is useful

Sql queries, find a name whose address is erode from student table

find a name whose address is erode from student table

Determine the advanced modeling concepts, Determine the Advanced modeling c...

Determine the Advanced modeling concepts You have to follow some steps for object-oriented design. These steps for OO Design methodology are as follow:  1)  Produce objec

Describe the objective of structural diagrams, Describe the objective of St...

Describe the objective of Structural Diagrams The main objective of structural diagram is to visualize, construct, specify and document static aspects of a system. Their eleme

Write short notes on transaction state, Write short notes on transaction st...

Write short notes on transaction state? A transaction may not always complete its implementation successfully such a transaction is termed aborted A transaction must be in o

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd