Given R ={A, B, C, D}, and the set of Functional dependencies A→BC, B→D. (a) Is the decomposition of R onto R1 ={A, B}and R2 ={B, C, D}lossless? Why? Is it dependency preserving? Why? (b) Is the decomposition of R onto R1 ={A, B}and R2 ={A, C, D}lossless? Why? Is it dependency preserving? Why? (c) Is the decomposition of R onto R1 ={A, B, C}and R2 ={B, D}lossless? Why? Is it dependency preserving? Why

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

A: Explanation:

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: 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: 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 R(A,B,C,D) and Functional dependencies A -> B, B -> C, C-> D, D -> B. Following…

A: Given:

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

A: A) The functional dependency are AB->C DC->AE E->F The key for the given relation is set of…

Q: Question 2 1. Given R (A, B, C, D, E, F) and the following set of functional dependencies: F =…

A: As per our guidelines, we are supposed to answer only 1st three parts. kindly repost the remaining…

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

A: According to question, There is a relation R = (A, B, C, D, E, G) with F of functional dependencies:…

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: 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: Consider the relation schema R=VWXYZ, with the set of functional dependencies F = {VW->XY, V->X,…

A:

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: 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: Consider a relation R={A,B,C,D,E,F,G,H,I} with the set of functional dependencies and determine,…

A: Now we must determine the above definition whether for each FD. Each value is super key or not on…

Q: Consider a relation R={A,B,C,D,E,F,G,H,I} with the set of functional dependencies and determine,…

A: The relation schema R is in a (BCNF) with respect to a set F of FDs if, and only if, for each FD X→Y…

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

A: A relation Schema of the set of functional dependencies

Q: Consider the relation schema R(A, B, C, D, E, F) and the set S = {AB->C, BC->AD, D->E, C->B) of…

A: ANSWER:-

Q: let F, be a canonical cover for F, i:= 0; for each functional dependency a → ß in F. i:=i+ 1; R, :=…

A: Answer :

Q: Consider the relation R = (A, B, C, D, E, F, G, H, I, J} and the set of functional dependencies F…

A: For this problem, we must get all the keys. For this, we must check all the attributes which are…

Q: Given the following relation: R (A, B, C, D, E, F, G) The functional dependencies that apply onto R…

A: The question is on database normal forms and functional dependencies.

Q: Consider the relation scheme R (A, B, C, D, E) and the set of functional dependencies F = { A –→ BC;…

A: Closure (A) =(A, B, C, D, E)  Closure(CD) =(C, D, E, A, B)  Closure (B) =(B, D)  Closure (E) =(E, A,…

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

A: Candidate Key: A minimal super key is known as the Candidate key. Superkey refers to the attributes…

Q: QUESTION 8 Here's a relation (R), its attributes, and its functional dependencies (F): R(A, B, C, D,…

A: A functional dependency is defined as if in a relation A→B , the values in attribute A have the same…

Q: Problem 1 Convert the following relation to 2NF, and then to 3NF. Show both conversions. (h, n, c,…

A: In this question, first, we find the 2NF. In 2NF, for relations where the primary key contains…

Q: Let R(A,B,C,D,E,F,G) be a relation with FDs F= {C→ EF, EG-→ D, DG A, A→ B} that hold on R. Which of…

A: Based on FD's relation is not even in 2NF , so first we will convert to 2NF then 3NF. NOTE: To be…

Q: Consider a relation with schema R(A,B,C,D,E,G) and functional dependencies (FDs) C→D; B→A; D→E; E→G…

A: Answer is given below .

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

A:

Q: Given a relational schema, R(A, B, C), and set of functional dependencies over R, F = {A → B, AB →…

A: a)A is not the super key, hence it does not represents the relation uniquely The super key will be…

Q: Problem 1 Convert the following relation to 2NF, and then to 3NF. Show both conversions. (h, n, c,…

A: 2NF: A relation is in 2NF if it is already in 1NF and all functional dependencies should be full…

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: Let R(A,B,C,D,E,F,G) be a relation with FDs F = {C→ EF, EG→ D, DG→ A, A→ B} that hold on R. Which of…

A: I have given an answer in step 2.

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: Consider schema(R, F), where R=ABCDE, F={D→EB, E→A, AC→D, BD→E}   Decompose the schema into a set…

A: Each table cell should contain a single value.Each record needs to be unique.In 1NF , a cell…

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

A: Given schema is:  R = (A,B,C,D,E,G) whereas set of functional dependencies are: Candidate Key: The…

Q: let F, be a canonical cover for F; i:= 0; for each functional dependency a → B in F. i:= i+ 1; R, :=…

A: Answer :

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

A: Primary key = AB as we can see in closure that we can find every attribute using AB

Q: Given the reation R (A, B, C, D , E), with functional dependencies: A, B -> C D, E -> C B -> D…

A: We have a relation R(A,B,C,D,E) and we have to decompose it into BCNF and check dependency…

Q: 1) Let F be a set of functional dependencies given as: F = {A'- BC, B → C, A - B, AB → C}; Find…

A:

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

A: The provided answer is

Q: For a relation named X with attributes (A. B, C, D, E, E), where the primary key of X = { A, C, F },…

A: 4NF data base i given below

Q: Consider a relation R, with attributes X, y, and z. Suppose that there is an unclustered B+ tree…

A: Introduction=====> used to implement db indexes =>in B+ tree leaf nodes denotes actal data…

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: Decompose R into a set of 3NF relations, that is lossless join and dependency preserving.

A: Here we decompose it in 3nf and check dependency preserving.…

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

A: I have given an answer in step 2.

Q: Question1: Consider the Entity Relational (ER) schema of relation R= (A, B, C, D, E(E1, E2));…

A: Since this question has multiple subparts we will answer only three. If you want any specific…

Q: Consider the following functional dependencies for a relation R(A, B, C, D) A -> (B, C, D), (A, D)…

A: Given relation with functional dependencies is: R(A, B, C, D) A -> (B, C, D), (A, D) -> (B, C)…