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

Incident report to the database, The Form input elements are:           ...

The Form input elements are:             Reporter name                                                text type input             Password

Describe the responsibilities of the dba and the database, Describe the res...

Describe the responsibilities of the DBA and the database designer ? The responsibilities of DBA and database designer are: 1. Planning for the database's future storage needs

Organic compounds, #question.explain diversity and magnitude of organic com...

#question.explain diversity and magnitude of organic compounds and general properties?

Explain the attribute inheritance, Explain the Attribute inheritance An...

Explain the Attribute inheritance Ans: Throughout the rendering of the objects in a view, attribute sets of objects higher in the view hierarchy are inherited via objects below

Oracle, I have 10+ yrs exp in oracle Sql ,Pl/SQl,Forms ,Reports. I am exper...

I have 10+ yrs exp in oracle Sql ,Pl/SQl,Forms ,Reports. I am expert in assignements & Online tutoring so i want to join you. Please guide me. Thanks Brajesh Shukla +91 9899641535

What are the objectives of query processing, What are the objectives of que...

What are the objectives of query processing?       Ans: The objectives of query processing is to transform a query written in a high level language into a accurate and efficien

Stock market, need requirement analysis for database management of stock ma...

need requirement analysis for database management of stock market

One-to-many relationship, For each 1: n relationship type R involving two e...

For each 1: n relationship type R involving two entities E1 and E2, we recognize the entity type (say E1) at the n-side of the relationship type R and contain primary key of the en

Explain odbc, Explain ODBC? ODBC - Open DataBase Connectivity (ODBC) e...

Explain ODBC? ODBC - Open DataBase Connectivity (ODBC) enable the integration of SQL along with a general-reasons programming language.

How is the database organised in oracle, How is the database organised in O...

How is the database organised in Oracle? Database organized within Oracle in terms of table and table holds attributes and values. A database consists of one or more logical

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