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

What are the three classes of sql expression, What are the three classes of...

What are the three classes of SQL expression? SQL expression consists of three clauses:  Select  From  Where

Processing arrays, 1. A company wants a report containing a breakdown of pa...

1. A company wants a report containing a breakdown of payroll by department. Input, which should be stored in 3 parallel arrays, includes each employee's department number, hourly

Problem about data mining for business intelligence, Do the 11.1 11.1 Cre...

Do the 11.1 11.1 Credit Card Use. Consider the following hypothetical bank data on consumers’ use of credit card credit facilities in Table 11.3. Create a small worksheet in Exce

What are the situations while dbms should not be used, What are the situati...

What are the situations while DBMS should not be used? DBMS should not be used in situations like: (i) No need of security. (ii) Not difficulty to access the data (iii) N

Where does view definition stored, Where does view definition stored? ...

Where does view definition stored? A view definition is permanently stored as part of the database.

ER model, coventions for displaying an ER schema as ER diagram

coventions for displaying an ER schema as ER diagram

Equi-join, explain equi-join using illustration

explain equi-join using illustration

Clustering indexes, Clustering Indexes It may be an excellent idea to k...

Clustering Indexes It may be an excellent idea to keep data of the students in the order of the programme they have registered as most of the data file accesses may need studen

Mention constraints to create command ddl, Mention the type of constraints ...

Mention the type of constraints we can specify in the CREATE command of DDL. The type of constraints that can be specified are as follows:- PRIMARY KEY, NOT NULL, UNIQUE, FOR

Information Technology, What benefits can a company gain by managing its ow...

What benefits can a company gain by managing its own information infrastructure and servicea

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