Question: Give an example of a relation schema R and a set of dependencies such that R is in BCNF, but is not in 4NF.

Give an example of a relation schema R and a set of dependencies such that R is in BCNF, but is not in 4NF.

Step by Step Solution

★★★★★

3.30 Rating (168 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock

The relation schema R A B C D E and ... View full answer

blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Document Format (1 attachment)

Word file Icon

16-CS-DB (203).docx

120 KBs Word File

Students Have Also Explored These Related Databases Questions!

Q:

Give an example of a relation schema R` and set F` of functional dependencies such that there are at least three distinct lossless-join decompositions of R` into BCNF.

Q:

Give an example of a situation for which invoking the controllability principle would have a desirable motivational effect. Also give an example of a situation for which suspending the...

Q:

Give an example of a recent political development that changed the overall strategy of an organization.

Q:

Give an example of a relation schema R and set F of functional dependencies such that there are at least three distinct lossless-join decompositions of R into BCNF.

Q:

Give an example of a relation schema R' and set F' of functional dependencies such that there are at least three distinct lossless-join decompositions of R' into BCNF

Q:

2. Using the database schema {R_1,R_2,...,R_n} and the corresponding sets F_1,F_2,...,F_n of FDs obtained from question (1.ii): (i) Using the definition of 3NF, explain whether each R_i is in 3NF or...

Q:

4. Consider a schema R = {A,B,C} and the set F of FDs: F = {AB --> C, C --> B}. (i) Using the definition of BCNF, explain whether or not R is in BCNF. (ii) Decompose R into BCNF preserving all...

Q:

This is how we have to do it according to the slides: Question 1 Given is the relational schema R= (A, B, C, D, E) and the set of functional dependencies F = {AB BC, C + A, ABC + D). Is R in BCNF? If...

Q:

This is how we have to do it!: Question 2 Given is the relational schema R= (A, B, C, D, E) and the set of functional dependencies F = {AB BC,C A, ABC D}. Is R in 3NF? If not, give a lossless and...

Q:

2. Consider the following set of functional dependencies on the relation schema R - (A, B, C, D, E, F, G): ABCD a) Compute BG+ GA GF CE F b) Find the candidate keys for R c) Remove extraneous...

Q:

In Section 6.2, Rosie lifts a trunk weighing 220 N up 4.0 m. If it take her 40 s to lift the trunk, at what average rate does she do work?

Q:

Thaler Company bought $26,000 of raw materials a year ago in anticipation of producing 5,000 units of a deluxe version of its product to be priced at $75 each. Now the price of the deluxe version has...

Q:

expects earnings next year of $ 3 . 9 8 3 . 9 8 per share and has a 4 0 % 4 0 % retention rate, which it plans to keep constant. Its equity cost of capital is 1 0 . 5 % 1 0 . 5 % , which is also its...

Q:

Write an algorithm for making a peanut butter and jelly sandwich, using a vocabulary of just 20 words (you choose the words). Assume that all ingredients are available in the cabinet or refrigerator...

Q:

How are cryptographic algorithms used in web applications? What key security concepts make the use of such algorithms imperative? How can cryptanalysis help improve the security provided by all...

Q:

Choose a specific technique (or a couple of techniques) that Hemingway uses in the two stories that you read this week. compare and contrast it with a story from previous weeks. Explain how the...

Q:

There are three main types of cryptographic algorithms: (1) secret key, (2) public key, and (3) hash functions. Pick an algorithm for any one of these types (e.g., des, aes, rsa, md5) Describe how it...

Q:

Explain the difference between face detection and face recognition. Give an example use of each in IT.

Q:

The first diagram depicts a compound in its liquid state. Which of the other diagrams best depicts the compound after it has evaporated into a gas? (a) (b)

Q:

In SQL, foreign key constraints can reference only the primary key attributes of the referenced relation or other attributes declared to be a superkey using the unique constraint. As a result, total...

Q:

Consider the following lattice structure of generalization and specialization A X B Y C

Q:

An E-R diagram usually models the state of an enterprise at a point in time. Suppose we wish to track temporal changes, that is, changes to data over time. For example, Zhang may have been a student...

Q:

Our discussion of lossless decomposition implicitly assumed that attributes on the left-hand side of a functional dependency cannot take on null values. What could go wrong on decomposition, if this...

Q:

Show that there can be more than one canonical cover for a given set of functional dependencies, using the following set of dependencies: X YZ, Y XZ, and Z XY.

Q:

Question 4 An executive is considering two different job offers. Information related to the jobs is below: ( 1 ) Base salary \ table [ [ Job Offer A , Job Offer B ] , [ $ , 5 0 , 0 0 0 , $ , 5 0 , 0...