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

Define the term- actors and data stores, Define the term- Actors and Data...

Define the term- Actors and Data Stores Actors: An actor is the active object which drives data flow graph by producing or consuming values. Actors are attached to inputs a

Determine the two special events, What are two special events? The two ...

What are two special events? The two special events are as "entry" and "exit". Any action which is marked as linked to entry event is executed whenever given state is entered v

What is a recovery scheme, What is a recovery scheme? An integral part ...

What is a recovery scheme? An integral part of a database system is a recovery scheme that can restore the database to the reliable state that existed before the failure.

Define the canonical cover, Define the Canonical cover Ans: A canonical...

Define the Canonical cover Ans: A canonical cover F c for F is a set of dependencies like F logically implies all dependencies in F c , and F c logically entails all dependen

Distributed Database query processing , I am doing research in this area, e...

I am doing research in this area, especially in sime join and join efficacy when several relations have been queried. Relations located in different sites. I need something like n

Top down method and bottom up method, Evaluate, compare and contrast the tw...

Evaluate, compare and contrast the two methods of relational database design namely top down method and Bottom up method. What will be your choice if you are asked to select a meth

Describe relational model, Describe relational model? Structure of rela...

Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages

What disadvantage of odbc does ole db overcome, What disadvantage of ODBC d...

What disadvantage of ODBC does OLE DB overcome? By breaking the features and the methods of a DBMS into COM objects, OLE DB characteristic overcomes a main disadvantage of ODBC

Describe about use case and external case in dfd, Describe about Use Case a...

Describe about Use Case and external case in DFD The processes are transformed those into the Use Case and external case in DFD has same characteristics which of an actor 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