Question: Consider a relation with schema S(A, B, C, D) with FDs A -> B, B ->C, and B -> D a) What are all the

Consider a relation with schema S(A, B, C, D) with FDs A -> B, B ->C, and B -> D

a) What are all the nontrivial FDs that follow from the given FDs? You should restrict yourself to FDs with single attributes on the right side. b) What are all the keys of R? c) What are all the superkeys for R that are not keys?

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!

Consider a relation with schema R (A, B, C, D) and FDs the set F: F={ } AB A C C D a. (5%) Determine the set of all candidate keys for the relation schema. b. (5%) Determine the highest normal form...

Consider a relation with schema R (A, B, C, D) and FDs the set F: F= { a. b. C. d. } AB-C C-D DA Find all the candidate keys of R. Indicate all BCNF violations for R. Decompose the relations into...

Question 1: Functional Dependencies [7 marks Consider a relation R on attributes (A, B, C, D, E, F,G, H) and the following functional dependen- cies. B G C D DE GC EF DEF H (a) What is the closure of...

2. (10%) Consider the ER diagram below for modeling an online bookstore. a. (6%) Translate the ER diagram into a relational model. b. (2%) Provide the Tuple Relational Calculus expression for the...

Consider the following relational schema: Table2 (A, B, C, D, E) The table has the following functional dependencies: C ? D A ? B A, C ? B, D, E Indicate the columns/attributes and their dependencies...

Problem 8 Consider a relation R AB E A, B, C, D, E, F, G, H) together with the functional dependencies: CD onsider RI (A, B, C, D) with the above functional dependencies. What would be a candidate...

Consider a relation with schema T(A, B, C, D) and with FD's AB -> C, BC -> D, CD -> A, and AD -> B. a) What are all the nontrivial FD's that follow from the given FD's? You should restrict yourself...

Consider a relation with schema R(A, B, C, D, E) and FDs AB C, C D, D B, D E a) Indicate all the BCNF violations. Do not forget to consider FDs that are not in the given set, but follow from them....

Consider a relation with schema R(A, B, C, D, E) and FDs AB C, C D, D B, D E. a) Indicate all the BCNF violations. Do not forget to consider FDs that are not in the given set, but follow from them....

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....

An all-equity firm is considering a $2 million project. The project is expected to generate earnings before taxes of $400,000 per year for ten years. To fully finance the project, the firm can obtain...

Do Problem 48 for a particle in the first excited state (n = 2).

If a compary presently has Bt credit rating. which one of the following will not contribute to achieving a higher credit rating? A lower debt to assets rais Langer retained earnings A higher interest...

CT Corp Comprehensive Question Canadian Tire Corporation, Limited ( Canadian Tire ) is a family of companies that includes a retail segment and a financial services division, among others. The retail...

to test high potential managers by throwing them in at the deep end;

to enable the development of managers in depth as well as in breadth;

to enable a balance and breadth of global management understanding at senior levels of management;