Question 6. Consider the relation R(ABCDE) and its functional dependencies set {AB->C, C->E, B-> D, E->A} The relation R is decomposed into R1(BCD) and R2(ACE). Which of the following option is correct about the decomposition? A) Decomposition is lossy and dependency preserving B) Decomposition is lossless and dependency preserving C) Decomposition is lossy and not dependency preserving D) Decomposition is lossless and not dependency preserving

Q: Question 6. Consider the relation R(ABCDE) and its functional dependencies set {AB->C, C->E, B-> D,…

A: Answer of the given question: choice (d) is the correct answer.  Lossless Decomposition:  Lossless…

Q: Answer the following questions about the relation R(a, b, c, d, e, f), with functional dependencies:…

A: Answer : R(a,b,c,d,e,f) a->f ab->cd c->e de->b bf->ae It  not violate any normal…

Q: Q2. Given a relation R( P, Q, R, S, T, U, V, W, X, Y) and Functional Dependency set FD = { PQ → R, P…

A: the answer is with full explaination is given below

Q: Question: Consider the relation: R(A, B, C, D, E, F, G, H, I, J, K, L,M,N,O,P,Q), {A, B} is the…

A: R(A, B, C, D, E, F, G, H, I, J, K, L,M,N,O,P,Q) Candidate key: {A, B}, {C,D,E}Prime attributes Non…

Q: bu are given the following set of functional dependencies for a relation R= (A , B C,D,E,F), F=…

A: Key of relation,relation in BCNF and dependency preserving decomposition

Q: Given R ={A, B, C, D}, and the set of Functional dependencies A→BC, B→D. (a) Is the decomposition…

A: The Functional dependency we have are A->B A->C B->D A->D A)  If we decompose the…

Q: Consider a relation schema R = {A, B, C, D, E} and its functional dependency set F = {A → BC,CD →…

A: The given relation is lossless-join decomposition and not dependency preserving. Hence, correct…

Q: Question 3 Consider a relation A(P, Q, R, S, T) with following functional dependencies. i.Р— QR ii.…

A: Relation: f a purposeful dependency X->Y holds true whereverY isn't a set of X then this…

Q: Consider the relation R with the following functional dependencies: R(P,Q, R, D, E, F) FD = {P >…

A: Given: Relation R with the following functional dependencies: R(P,Q, R, D, E, F) FD = {P > Q,QR →…

Q: 3. Suppose you are given a relation R(PQRSM)and the F, the set of functional dependencies that hold…

A: R(P, Q, R, S, M)  PQ -> R PQ -> S R -> P S->Q (PQ) + ={PQRS} (RS) + ={RSPQ} Therefore…

Q: Given a relation R( P, Q, R, S, T, U, V, W, X, Y) and Functional Dependency set FD = { PQ → R, P →…

A: Given: a relation R( P, Q, R, S, T, U, V, W, X, Y) and Functional Dependency set FD = { PQ → R, P →…

Q: Consider the following set F of functional dependencies on the relation schema (A, B, C, D, E, G):…

A: Given a set of functional dependencies on a relational schema and we need to give a BCNF…

Q: Given R ={A, B, C}, and the set of Functional dependencies   A→B, B→C. (a) Is the decomposition of…

A: Explanation:

Q: Given the following relation schema R(B, N, O, A, T, C) and the set of functional dependencies F =…

A: F = {C-->OT, O-->AC, CN-->B, CB-->A, B-->N}: R(B, N, O, A, T, C)

Q: Consider a relation R(A,B,C,D,E) with functional dependencies AB→C, A→D, and D→E.   (a)  What are…

A: In given question, we have asked the key for given Relation R and closue of A and closure of AC. Key…

Q: 1. Given a relation model R, where U = {A, B, C, D, E}, F = {A->BC, C->D, BC->E, E->A}. The…

A: Note:- Please send the question once again if you wish to answer another question, as set out in the…

Q: For relation (R), its attributes and its functional dependencies (F): R(A, B, C, D, E) CD-> B A- D…

A: A relational schema R is considered to be in Boyce–Codd normal form (BCNF) if, for every one of its…

Q: Given a relation R(F, G, H, I, J, K) and functional dependencies: • G-> FI • H> JK The candidate key…

A: Refer to step 2 for the answer.

Q: Here's a relation (R), its attributes and its functional dependencies (F): R(A, B, C, D, E, F, G)…

A: Given functional dependencies: BC -> DG CD -> F FG -> A 1. Closure of {ACD}+ is: {ACD}+ =…

Q: Consider a relation schema R = {M, N, P, Q, S} and its functional dependency set F = {N → Q,S → M,M…

A: Given: R = {M, N, P, Q, S} F = {N → Q, S → M, M →P, P → S}   Rule to find Super Key in a relation…

Q: Consider a relation schema R = {A, B, C, D, E, F, G} with the following set of functional…

A: A relational schema R with the set of functional dependencies

Q: Given the following relation schema R(B, N, O, A, T, C) and the set of functional dependencies F =…

A:

Q: Functional dependency forms the basis for Normalization and considered a kind of integrity…

A: The concepts of functional dependency, its types and the various axioms,closure and canonical cover…

Q: Consider the following set F of functional dependencies on the relation schema(A, B, C, D, E, G):A →…

A: The original relation is r(A,B,C,D,E,F). This relation is not BCNF due to the first functional…

Q: Given the relation R(C, D, E, F) and functional dependency: C-> DF Which of the following functional…

A: Answer to the above question is in step2.

Q: Consider a relation schema R = {A, B, C, D, E, F, G} with the following set of %3D functional…

A: In this question, we have a relation schema R along with its functional dependencies F. Also given 4…

Q: Consider the relation scheme R = {A, B, C, D, E, F, G, H} with the following set of functional…

A: Candidate keys are the set of smallest essential attributes that can generate all the values in the…

Q: Consider the relation scheme R = {A, B, C, D, E, F, G, H} with the following set of functional…

A: I have given an answer in step 2.

Q: Consider a relation T with seven attributes ABCDEFG where AB is a composite primary key for T.…

A: Given the relation relation T with seven attributes ABCDEFG where AB is a composite primary key for…

Q: QUESTION 19 Eiven relation R(A, B, C, D, E, F, G, H, I, J) and the following set of function…

A: Given,  AB -> C A -> DE F - > GH D -> IJ A+ (Closure) = ADEIJ Explanation: A -> A…

Q: Consider the following set F of functional dependencies on the relation schema(A, B, C, D, E, G):A →…

A: The given set of functional dependencies are: (A, B, C, D, E, G):A → BCDBC → DEB → DD → A  Now, we…

Q: A) “Functional dependency forms the basis for Normalization and considered a kind of integrity…

A: Functional Dependency (FD) is a constraint in a Dbms that determines the relationship between one…

Q: Suppose you are given a relation R-(A,B,C,D,E) with the following functional dependencies:…

A: Relation R which is defined functional dependencies

Q: Consider the unnormalized relation R with six attributes ABCDEF and the following functional…

A: Objective: A relation R is given with 6 attributes ABCDEF along with functional dependencies as: AB…

Q: Suppose you are given a relation R=(A,B,C,D,E) with the following functional dependencies:…

A: Given Suppose you are given a relation R=(A,B,C,D,E) with the following functional dependencies:…

Q: Consider a relation schema R = {A, B, C, D, E, G} and its functional dependency set F = {A → BCD,BC…

A: Given: R = {A, B, C, D, E, G} F = {A → BCD, BC →DE, B → D, D → A}   B+ is basically a closure of B.…

Q: Consider the relation R(A,B,C,D,E,F,G) with the following functional dependencies: A-CDE, B F.…

A: Given Data : Relation :- A,B,C,D,E,F,G Dependency :- A->CDE , B->F

Q: Consider a relation r(A, B, C), with an index on attribute A. Give an example of a query that can be…

A: Example: Consider a relation r(A,B,C) holding an index on attribute “A”. The query plans that only…

Q: nswer the following questions about the relation Rla, b, c, d, e, f), a -> f ab -> cd C->e de -> b…

A: A)  Primary key is ab.  a -> f violates 2NF since it's a partial FD ab -> cd : none c -> e…

Q: Consider the relation schema R (A, B, C, D) with all possible functional dependencies. For each of…

A: 1. A, C -> B, D C -> D Here the key for the relation is (AC)  The FD C->D is a partial…

Q: Consider the relation schema R (A, B, C, D) with all possible functional dependencies. For each of…

A: 1. A, C -> B, D C -> D Here key for the given relation is (AC)  The FD C->D is a partial…

Q: Consider the relation r(A, B, C) with the attribute A as the index. Give an example of a query that…

A: Given: Consider the relation r(A, B, C) with the attribute A as the index. Give an example of a…

Q: Consider the relation r(A, B, C) with the attribute A as the index. Give an example of a query that…

A: Answer is given below .

Q: Consider the relation r(A, B, C) with the attribute A as the index. Give an example of a query that…

A: GIVEN: Consider the relation r(A, B, C) with the attribute A as the index. Give an example of a…

Q: QUESTION 23 Given the relation R(V, W, X, Y, Z) and functional dependencies: • VY -> Y • W-> XZ • VY…

A: The given relation is in First normal form. As the only candidate key for given relation is VY.…

Q: Exercise 8.4.4: Composition of relations and arrow diagrams, cont. Below is the arrow diagram for…

A: Hey there, I am writing the required solution based on the above given question. I am also attaching…

Q: Consider the relation r(A,B ) with the following instance of r. Which of the functional dependencies…

A: Rules to check valid functional dependency from   α -> β   Check if all the values of α are…

Q: |A--→ BC, C---→D for relation R? es, why? If no, please nd Dependence Prese

A: For finding the key of relation R, Step 1 - Search the attributes which are not in right hand side…

Q: Consider the schema R = (A, B, C, D, E, G, H) and the set F of functional dependencies:AB → CDD →…

A: 3NF decomposition: Any relation is said to be in 3NF if it follows following characteristics: The…

Q: Suppose you have a Relation that has an atomic Primary Key and noRepeating Groups. All non-key…

A: According to the details provided about the relation, the relation is in 2NF. This relation has to…