Decompose the table - 3nf or bcnf, Database Management System

Assignment Help:

Decompose the table with the following description and functional dependencies into a set of equivalent tables normalized to 3NF or BCNF.

A long-standing international treaty among the leaders of the world's developed countries prevents any and all evidence of extraterrestrial life that has been discovered from being reported to the people of Earth.  Although each country dedicates many federal agencies to furthering the country's interests, in the case of contact with extraterrestrial life, all relevant agencies of the world have agreed to cooperate.  They have developed a database in which information pertaining to extraterrestrial life encounters is recorded.  Much of the data is the identification information about those involved in an instance of contact.  Multiple humans and multiple aliens (assume these are all of one species in a single encounter) may be involved in a single encounter, and sometimes the same human will be involved in more than one encounter.  Encounters are classified in a standardized manner.  The final outcome(s) of the human participant(s) in the encounter is (are) also recorded.  Students of social psychology around the world whisper that this final outcome is a government-created and enforced disposition of the most sinister sort.

Data:

governmentID: the international identification for a government official who is responsible for information on an encounter
governmentOfficialName: the name of a participating government official       
securityClearanceRating: a government official's international security clearance  
agency: the federal agency for which the government official works                        
country: a government official's country of citizenship                
alienID: the identification for an extraterrestrial life form                                      
alienSpeciesName: the name of an extraterrestrial life form's species             
homePlanet: the planet or solar system + planet from which an extraterrestrial life form comes
communicationAbility: the level at which an extraterrestrial life form can communicate
victimID: the identification assigned to a human who encounters extraterrestrial activity
victimName: the name of the human who encountered extraterrestrial activity
victimDateOfBirth: the birthdate of the human who encountered extraterrestrial activity
victimDisposition: the final outcome of the human after an encounter             
encounter: the identification assigned to any instance of alien-human contact
encounterDate: the date an instance of contact occured
encounterType: the type of alien-human contact which occurred

Functional dependencies:

governmentID→governmentOfficialName, securityClearanceRating, agency, country
alienID→alienSpeciesName, homePlanet, communicationAbility
victimID→victimName, victimDateOfBirth

victimEncounter→victimID, encounter, victimDisposition
alienEncounter→alienID, encounter
encounter→encounterDate, governmentID, encounterType


Related Discussions:- Decompose the table - 3nf or bcnf

Decompose the table - 3nf or bcnf, Decompose the table with the following ...

Decompose the table with the following description and functional dependencies into a set of equivalent tables normalized to 3NF or BCNF. A long-standing international treaty am

Relational algebra and calculus, Q.  What is relational algebra and calcul...

Q.  What is relational algebra and calculus? Explain the relational algebra operators :- Selection and predicate, set operation, joins and division. Sol. Relational Algebra

Attributes and tuple, Before we talk about the relational model in more det...

Before we talk about the relational model in more detail, let us first define some very basic terms used in this model. Tuple Every row in a table shows a record and is cal

Discuss the three level architecture of dbms, PRINCIPLES OF DATABASE 1....

PRINCIPLES OF DATABASE 1. State the following terms: a) Database b) Database Management System c) Entity d) Attribute e) Relationship 2. Discuss the Three Level Architecture

Candidate keys, Super keys of a relation can have extra attributes. Candida...

Super keys of a relation can have extra attributes. Candidate keys are minimal super key, i.e. such a key have no extraneous attribute. An attribute is known as extraneous if even

What is primary key explain, What is primary Key Explain? Primary Key ...

What is primary Key Explain? Primary Key - Primary key is one of the candidate keys. It should be selected such in which its attribute values are never, or very rarely, chang

Write short notes on schema diagram, Write short notes on Schema diagram. ...

Write short notes on Schema diagram. A database schema along with primary key and foreign key dependencies can be depicted pictorially by schema diagram. Every relation appears

Prepare a gantt chart for the stock control project, Prepare a gantt chart ...

Prepare a gantt chart for the stock control project: Scenario Lucas-TVS is the Leader in Auto Electricals in India today with 50 years experience in desig

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