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

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

Posted Date: 3/29/2013 2:23:57 AM | Location : United States







Related Discussions:- Decompose the table - 3nf or bcnf, Assignment Help, Ask Question on Decompose the table - 3nf or bcnf, Get Answer, Expert's Help, Decompose the table - 3nf or bcnf Discussions

Write discussion on Decompose the table - 3nf or bcnf
Your posts are moderated
Related Questions
I want a professional with strong IT background who provide me timely assignments Project Description: I want a professional who can do my assignments for my major i.e. Infor


What is relationship instance ? Relationship Instance - A relationship is a relation between two or more entities. An instance of relationship set is a set of relationships.

What is banker's algorithm?  Banker's algorithm is a deadlock avoidance algorithm that is applicable to a resource-allocation system with multiple instances of each resource ty

Limitations of File Based System The file-based system has some limitations. The limitations are listed as follows: Isolation and separation of data: When the data is

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

courier company er-diagram

What are the two distinct aspects to the implementation of associations? i) It is required to define data declarations which will enable details of actual links to be stored. I

i am not clear with the climetic condition of the north indian plain. can u plz explain it for me

1. Use the Invoice table structure shown below to answer the following questions: a)  Draw the dependency diagram and identify the primary key and all dependencies, including al