Consider a relation schema R = {A, B, C, D, E} and its functional dependency set F = {A → B,CD → E,B →D,E → A}. Compute A+ and choose the answer. (a) A+ = AB (b) A+ = ABC (c) A+ = ABCD (d) A+= ABCDE (e) none of the above

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

Q: 3. Disprove the following rule: {B > CD, AB → E, E → C} |= {AE → CD} To disprove a rule, construct a…

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Q: Given the functional dependency (A, B) C and BCthen it is true that AC O True O False

A: It is False

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

A: f ={     AB → C,      A → D,      B → F,  F → GH,  D → IJ   } To find the key check the RHS of the…

Q: Exercise 3.2.1: Consider a relation with schema R(A, B, C, D) and FD’s AB → C, C → D, and D → A. a)…

A: Answer : For the single attributes we have {A}+= A, {B}+= B, {C}+= ACD, and {D}+=AD. Thus, the only…

Q: Problem 3 Consider the relation R = {A, B, C, D, E, F,G, H, I, J} and the set of functional…

A:

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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: Given a relation schema R = (A, B, C) and its functional dependencies F = {A →B, B→ C). Suppose R is…

A: Answer is given below-

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A: A relation schema R is decomposed into R1 and R2

Q: 1.) Let R be a relation defined on the set Z by aRb if a < b. What property/properties are violated?…

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A: This answer will demonstrate that the given relation schema R = (X, Y, Z) with functional…

Q: g set of five functional dependencies which hold on R: A → B A C BD → E EC → A E →G ompute the…

A: Closure (CE) = { C, E, G, A, B} Closure (AD) ={A, D, B, C, E, G}

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A:

Q: Given 5 dimensional parameters A, B, C, D, E, F and the following set S of functional dependencies S…

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Q: Which of these FDs hold on the

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

A:

Q: Let R(A, B, C, D, E, F) be a relation with FD's: {D → CE, C → BDE, E → AD, AF → E, B → D Which of…

A: Candidate keys is {F} Here for X-&gt;Y, the relation will be in 3nf if X is a super key or Y is one…

Q: {u,d,e,f,w}, y,c,d,e,f}}. -Y,C,d,e

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Q: Assume a relation schema R(a, b, c, d, e, f) with primary key (a, b) and the following full func-…

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Q: six attributes A, B, C, unctional CR→DADFC-

A:

Q: Consider the functional dependency of relation R (A, B, C,D) F%3D {A—ВС, В-С, А —В, АВ—D; Compute…

A: Closure Sets Of F+ is all three sets and closure of B+ is second one( in bold) {A}+= {A,B,C,D} {B}+=…

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A: for dependency preserving, F1 U F2 = F where F1 is the functional dependency of R1 F2 is the…