Question: Let R(ABCDE) be a relation schema and let F ={AB E, BE C, CE D, E B, BC D} be the set of functional dependencies

Let R(ABCDE) be a relation schema and let F ={AB E, BE C, CE D, E B, BC D} be the set of functional dependencies that are satised by R.

(3.1) Using the computation of attribute closure X +,determine if each functional dependencybelow is in F+ or not.

a) E D b )A B c)AB D d )BC E

(3.2) Is F already minimal?Explain your answer.

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:

Q:Question:Given the relation schema R(A, B, C, D, E, F, G) with the set of functional dependencies F={BD?A, BC?E, A?F, B?G, C?D, A?B}. Check whether each of the following functional dependencies is...

Q:

Let R(A,B,C,D,E) be a relation schema, and let F = {A BC, CD E, BD,EA} be a set of functional dependencies (FDs). Show for each of the following FDs whether they can be logically implied from F by...

Q:

Given a relation schema R(A, B, C, D, E, G, H), with F={ABC, BC, CDG, DCG, HDEG, EDH} 1- Give a minimal cover of F 2- Determine all keys of R 3- Give a 3NF decomposition of R 4- Is your decomposition...

Q:

Suppose we have a relation schema R(A, B, C, D, E, F, G) and a set of functional dependencies H = {BCD A, BC E, A F, FG, C D, A GA B}. Decompose R into 3NF by using the 3NF synthesis algorithm. Show...

Q:

Problem 1 (35 Points) For the relational schema given below and the corresponding functional dependencies (FDs) R(A, B, C, D, E) S = {AB E, B C, B D, CE A}, answer the following questions: a. (10...

Q:

Consider the following set F of functional dependencies on the relation schema R ( A , B , C , D , E ) : AB - > C A - > B B - > D C - > A D - > CE E - > BGive a lossless BCNF decomposition of r based...

Q:

1. (6 pts) Consider the following instance 4 (1) Does the functional dependency D->C hold in this instance? (2) Does the functional dependency C->B hold in this instance? (3) Does the functional...

Q:

a) [15 marks] Consider a relation schema N (R, F) where R = {A, B, C, D} and F = {BC, CDA, BD}. Perform the following tasks. Justify your answers. 1) Identify all keys for N. Show your process. 2)...

Q:

Consider the following set F of functional dependencies on the relation schema R ( A , B , C , D , E ) : AB - > C A - > B B - > D C - > A D - > CE E - > B ( a ) List all the candidate keys for R (...

Q:

115 marks! Consider a relation schema N (R, F) where R-A, B, C, D} and F= A->B, CD. Perform the following tasks. Justify your answers. 1) Identify all keys for N. Show your process. 2) Identify the...

Q:

Due to the limited availability of recycling materials, the plant manager is considering making a pitch to the President regarding an addition to the current line of products from the Charlotte...

Q:

Consider a common stock that has just paid an annual dividend of $ 2 . 5 0 . Future annual dividends are expected to grow at 4 % per year, indefinitely. If equity holders have a required rate of...

Q:

Compared with half a century ago, adoption has become _ _ _ _ _ _ _ _ _ common, but it is more open and acceptabl e , so we probably discuss it _ _ _ _ _ _ _ . fill in the blanks more or much less or...

Q:

How do Data Types perform data validation?

Q:

How does Referential Integrity work?

Q:

What are Dimensional Relational Databases designed to hold primarily?