Question

4. Consider the relation schema R(ABCDE) with the set of functional dependencies F={B→E, A→B, DE→C, D→A,...

4. Consider the relation schema R(ABCDE) with the set of functional dependencies F={B→E, A→B, DE→C, D→A, C→AE}. For the following relations resulting from a possible decomposition of R, identify the non-trivial functional dependencies which can be projected to each of the decomposed relations.

a) S(ABC)

b) T(BCE)

c) U(ABDE

Math   Advanced-Math   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
There are the set of FD for a Relation R(A, B,C,D,E,F,G) F= (A->B, BC->DE, AEF->G, AC->DE)...
There are the set of FD for a Relation R(A, B,C,D,E,F,G) F= (A->B, BC->DE, AEF->G, AC->DE) Then a) What are the Candidate keys for R? Justify your answer. b) Is R in BCNF? Justify your answer. c) Give a 3NF decomposition of this Relation. d) Is your answer above is Lossless join and Dependency Preserving.?
Suppose we have the following relation R with composite primary key {A,B} together with the set...
Suppose we have the following relation R with composite primary key {A,B} together with the set FD of functional dependencies: R(A,B,C,D,E,F,G). FD = { C -> G, E -> B, A -> D, AB -> C, AB -> D, AB -> E. AB -> F, AB -> G } Draw the initial dependency diagram using the above information. The relation from part a) is in first normal form. Using the techniques described in the lecture, convert it to 2NF by...
Given a relation R(A, B, C, D, E) with the following FD Set FD = {...
Given a relation R(A, B, C, D, E) with the following FD Set FD = { A→C, B→C, C→D, DE→A, CE→A} Suppose we decompose it into R1(A, D), R2(A, B), R3(B, E), R4(C, D, E) and R5(A, E), is it a lossless decomposition? Show your proof.
There is no equivalence relation R on set {a, b, c, d, e} such that R...
There is no equivalence relation R on set {a, b, c, d, e} such that R contains less than 5 ordered pairs (True or False)
2. Define a relation R on pairs of real numbers as follows: (a, b)R(c, d) iff...
2. Define a relation R on pairs of real numbers as follows: (a, b)R(c, d) iff either a < c or both a = c and b ≤ d. Is R a partial order? Why or why not? If R is a partial order, draw a diagram of some of its elements. 3. Define a relation R on integers as follows: mRn iff m + n is even. Is R a partial order? Why or why not? If R is...
Please answer ASAP Database Consider the relation scheme R = {A, B, C, D, E} with...
Please answer ASAP Database Consider the relation scheme R = {A, B, C, D, E} with the FDs A --> BC CD --> E Consider the following decompositions: (4.a) R1 = {A, B, C} and R2 = {C, D, E} (4.b) R1 = {A, B, C} and R2 = {A, D, E} (4.c) R1 = {A, B} and R2 = {A, C, D, E} (4.d) R1 = {A, B, C}, R2 = {C, D, E} and R3 ={A, D}. For...
Let S = {A, B, C, D, E, F, G, H, I, J} be the set...
Let S = {A, B, C, D, E, F, G, H, I, J} be the set consisting of the following elements: A = N, B = 2N , C = 2P(N) , D = [0, 1), E = ∅, F = Z × Z, G = {x ∈ N|x 2 + x < 2}, H = { 2 n 3 k |n, k ∈ N}, I = R \ Q, J = R. Consider the relation ∼ on S given...
Consider permutations of the 26-character lowercase alphabet Σ={a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z}. In how many of these permutations do a,b,c...
Consider permutations of the 26-character lowercase alphabet Σ={a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z}. In how many of these permutations do a,b,c occur consecutively and in that order? In how many of these permutations does a appear before b and b appear before c?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT