Identify the candidate keys, Database Management System

Assignment Help:

Consider the following six relation schemes and their corresponding sets of functional dependencies. In each case identify

a. All the candidate keys

b. The highest normal form of the relation (2NF, 3NF, BCNF).

R1 (W, X, Y, Z) XY→Z, Y→ W

R2 (K,L,M,N) KL→N, K→M

R3 (P,Q,R,S) P→Q, Q→R, R→S

R4 (T,U,V) T→U, U→T, T→V

R5 (W,X,Y,Z) Z→W, YZ→W, WY→XZ

R6 (A,B,C,D) AB→D, AC→D

Related Discussions:- Identify the candidate keys

Decompose the table with the functional dependencies, Decompose the table w...

Decompose the table with the following description and functional dependencies into a set of equivalent tables normalized to 3NF or BCNF. This database stores records from a (ve

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

Explain entity integrity and referential integrity rules, Explain entity in...

Explain entity integrity and referential integrity rules within relational model. Show how these are realized in SQL? Entity Integrity Rule - No primary key value could be nu

File Management Principles, What are the requirements to ensure the objecti...

What are the requirements to ensure the objectives of file management principle is realized?

Weak entity, Entity types that do not have any key attribute, and therefore...

Entity types that do not have any key attribute, and therefore cannot be identified independently, are known as weak entity types. A weak entity can be recognized uniquely only by

Define 1 nf normal form, 1 NF Normal Form The domain of attribute must...

1 NF Normal Form The domain of attribute must add only atomic (simple, indivisible) values First normal form (Minimal Form or 1NF) is a normal form need in database normalizat

Different stages of ddlc, Different stages of DDLC ?

Different stages of DDLC ?

Describe the grant function and explain security, Describe the GRANT functi...

Describe the GRANT function and explain, how it associates to security. What kind of privileges may be granted? How are they revoked? Ans: Since more than one user can aacce

Prove that a relation which is 4nf must be bcnf, Prove that a relation whic...

Prove that a relation which is 4NF must be BCNF. Ans Let R be in 4NF. Suppose it is not in BCNF. Hence, there exists an FD X→Y in R such that x is not a super key. Although

Mysql, he SQL query that will return the order number, quantity ordered, pr...

he SQL query that will return the order number, quantity ordered, price each and total cost of an order (quantity * price each) from the order details table. Label the calculated c

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages