Question: Suppose we are told that a relation S ( A , B , C , D ) is in BCNF , and that exactly 3

Suppose we are told that a relation S(A, B, C, D) is in BCNF, and that exactly 3 out
of the 4 FDs listed below hold for S. Choose the FD from the list below that does not
hold on S because it violates BCNF. Hint: consider the possible scenarios when you
have 3 out of 4 FDs that hold. For each scenario, determine if the fact that S is in BCNF
is true in that scenario.
1: A->BCD
2: BC -> A
3: CD->B
4: D->C

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock 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

Students Have Also Explored These Related Databases Questions!

Q:

Which one is correct w . r . t . RDBMS ? primary key super key candidate key primary key candidate key super key super key candidate key primary key super key primary key candidate key The relation...

Q:

4) For each of the following relation schemas and sets of FDs: Decompose the relations, as necessary, into collections of relations that are in BCNF. Do not forget to consider FDs that are not in the...

Q:

3.3.5 Exercises for Section 3.3 Exercise 3.3.1: For each of the following relation schemas and sets of FDs: a) R(A, B, C, D) with FDs AB C, C -> D, and D A. b) R (A ,B ,C ,D ) with FDs B > C and B D....

Q:

ONLY a), b), and c)! For each of the following relation schemas and sets of FD's: a) R(A, B, C, D) with FD'S AB - C, C-D, and D-A. b) R(A, B, C, D) with FD's B - C and B D. C) R(A, B, C, D) with FD'S...

Q:

Please explain in depth decomposition. Exercise 3.3.1: For each of the following relation schemas and sets of FD': a) R(A, B,C, D) with FD's AB -C,CD, and D A b) R(A, B,C, D) with FD's BC aud B-D c)...

Q:

COSC 3318-Assignment5(0)-4 (Compatibility Mode]-Word ENCES MAILINGS REVIEW VIEW ADD-INS ,1.2 . EE., .IITNormal TNIo Spac.. Heading 4 Title Sub- Paragraph Styles 3. (20 points) Suppose we have...

Q:

Problem 3 [ 2 0 ] For each of the following relation schemas and sets of FD s: a ) R ( A , B , C , D ) with FD s AB C , C D and D A . b ) R ( A , B , C , D ) with FD s A B C , B C D , CD A , and AD B...

Q:

Insert anomaly means the inability to create a new record due to the absence of other data (2 points) True False 2 Specialization S: S = {V1, V2, ..., vn) is a set of subclasses with the same...

Q:

Consider the relation R- IA, B, C, D, E, Fl and the following set of FDs on R: Consider also the relations: R1 (A, B, C), R2 (A, B, C, E, F), and R3 (A, B, C, D). Q3.1 (2x3-6 points) Compute the...

Q:

4) For each of the following relation schemas and sets of FDs: a) R(A, B, C, D) with FDs AB C, C D, and D A. b) R(A, B, C, D, E) with FDs AB C, C D, D B, and D E. Decompose the relations, as...

Q:

JLC Corporation has annual sales of P3,500,000 for the year 2015, 80% of this is on credit. The credit collection department determined that 10% of its credit sales would be uncollected. What would...

Q:

Marketing, Celebrity Endorsement, and Market Share - are there relationships in the BSG among these three factors? If so, what are they? Is there something missing from this list that also influences...

Q:

Under the NPV technique, the project's cash flows are discounted at the project's internat or expected rate of return. True False

Q:

A random sample of 43 biology students in a science program are selected for a study. Of those selected, only 27 passed the mid term exam. At the 5% significance level, is there sufficient evidence...

Q:

3. Guidelines for Multinational Corporations. The guidelines for Multinational Enterprises established by the Organization for Economic Cooperation and Development and presented on the OECD Web site...

Q:

2. Review the index of wage rates of 1980, 1990, 1998, 2002, and 2005 and determine whether the strategy and decision in 2008 would be the same as in the previous years. You are the owner of a small...

Q:

1. Identify six imperatives for studying intercultural communication.