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Consider relation Ti, with attributes A, B, and C: 2 |...
Consider a relation R with five attributes A, B, C, D, and E. You are given...
Consider a relation R with five attributes A, B, C, D, and E. You are given the following functional dependencies: A → B, BC→E, and ED→A. (a) Is R in BCNF? If it is not, decompose it into a collection of BCNF relations. 2: BCNF and 3NF (3 points) Consider the relation schema R with attributes A, B, C, and D and the following functional dependencies: AB→C, AC→B, B→D, BC→A. (a) Is R in BCNF? If it is not, decompose...
Consider the relation R with attributes: A, B, C, D, E, and F Let S be...
Consider the relation R with attributes: A, B, C, D, E, and F Let S be a set of functional dependencies in R such that S = { A-> B, CD-> E, C-> D]. Which of these attributes are in the closure of [C, F)?
Consider a relation R with ve attributes A, B, C, D, and E. You are given...
Consider a relation R with ve attributes A, B, C, D, and E. You are given the following functional dependencies: A->B, BC->E, and ED->A. (a) List all keys for R. (10 points) (b) Is R in BCNF? If it is, explain why. If is not, decompose it into a collection of BCNF relations. (20 points) (c) Is R in 3NF? If it is, explain why. If it is not, convert it into a collection of 3NF relations. (20 points)
Consider the following FD set on a relation E with six attributes: F, R, I, D,...
Consider the following FD set on a relation E with six attributes: F, R, I, D, A, and Y. YI FI D A F D R DR A Its candidate keys are [(YF), (YD), (YA)} Tasks: 1. List prime attributes and non-prime attributes for the relation E. Justify your answer. 2. Classify each functional dependence for the relation E. Justify your answer. 3. Determine the normal form of the relation E. Justify your answer.
Consider the following FD set on...
Consider the following relation: R(A,B,C,D,E) The following set of functional dependencies are ture on the relation...
Consider the following relation: R(A,B,C,D,E) The following set of functional dependencies are ture on the relation R: FD: AB -> E, E -> D, AD -> C Which of the following sets of attributes does not functionally determine C? AC ABE BD AE AB
Here's a relation (R), its attributes and its functional dependencies (F): R(A, B, C, D, E)...
Here's a relation (R), its attributes and its functional dependencies (F): R(A, B, C, D, E) C D → B A → D D → C E → C What is the closure of AB ({AB}+)? What is the closure of F (F+)? [ set of closures for all LHS][each LHS on one line] What is the minimal set (cover) for F? Provide a key for relation R (a minimal set of attributes that can determine all attr.) Decompose the...
Dr. Ugur Quiz 2 ITC 341 Spring 2019 Name: Consider three tables TI, T2 and T3...
Dr. Ugur Quiz 2 ITC 341 Spring 2019 Name: Consider three tables TI, T2 and T3 below. Show the results of the following operations: Date: 02.13.2019 Total 20 points, open book & notes) for each question, you need to write down the attribute names on the top, similar to tables below) 10 15 25 z 10 y 30 z 10 25 10 25 z 10 x 6 30 z 3 25 z 6 (Use the space on the right-hand side...
Again, suppose we have a relation on attributes A, B, C, D, E, and F, and...
Again, suppose we have a relation on attributes A, B, C, D, E, and F, and these functional dependencies hold: S = { B → DE, BF → C, CF → B, DF → AE }. (a) Does it follow from S that B → A? (b) Does it follow from S that CF → E? (c) Does it follow from S that DF → B? (d) Does it follow from S that BD → C? (e) Does it follow...
Question 1: Functional Dependencies [7 marks Consider a relation R on attributes (A, B, C, D,...
Question 1: Functional Dependencies [7 marks Consider a relation R on attributes (A, B, C, D, E, F,G, H) and the following functional dependen- cies. B →G C →D DE →GC → EF DEF → H (a) What is the closure of [F, G, Hy? (b) List all of the candidate keys of R under the dependencies above. (c) List all of the FDs above that are 3NF violations (d) List all of the FDs above that are BCNF violations....
2. (15 points) Consider a relation with schema R(A,B,C,D) and FD= { AB->C, C->D, D- >A),...
2. (15 points) Consider a relation with schema R(A,B,C,D) and FD= { AB->C, C->D, D- >A), what are the keys of R? Hint: Consider the 15 possible non-empty subsets of attributes. First check if a set of attributes X in R is a super key of R. If X-> R then X is superkey of R. Then X is a super key and no subset of X is a super key, then X is a key - a minimum super...
Consider the relation R with attributes: A, B, C, D, E, and F Let S be a set of functional dependencies in R such that S = { A-> B, CD-> E, C-> D]. Which of these attributes are in the closure of [C, F)?
Consider the following FD set on a relation E with six attributes: F, R, I, D, A, and Y. YI FI D A F D R DR A Its candidate keys are [(YF), (YD), (YA)} Tasks: 1. List prime attributes and non-prime attributes for the relation E. Justify your answer. 2. Classify each functional dependence for the relation E. Justify your answer. 3. Determine the normal form of the relation E. Justify your answer.
Consider the following FD set on...
Dr. Ugur Quiz 2 ITC 341 Spring 2019 Name: Consider three tables TI, T2 and T3 below. Show the results of the following operations: Date: 02.13.2019 Total 20 points, open book & notes) for each question, you need to write down the attribute names on the top, similar to tables below) 10 15 25 z 10 y 30 z 10 25 10 25 z 10 x 6 30 z 3 25 z 6 (Use the space on the right-hand side...
Question 1: Functional Dependencies [7 marks Consider a relation R on attributes (A, B, C, D, E, F,G, H) and the following functional dependen- cies. B →G C →D DE →GC → EF DEF → H (a) What is the closure of [F, G, Hy? (b) List all of the candidate keys of R under the dependencies above. (c) List all of the FDs above that are 3NF violations (d) List all of the FDs above that are BCNF violations....
2. (15 points) Consider a relation with schema R(A,B,C,D) and FD= { AB->C, C->D, D- >A), what are the keys of R? Hint: Consider the 15 possible non-empty subsets of attributes. First check if a set of attributes X in R is a super key of R. If X-> R then X is superkey of R. Then X is a super key and no subset of X is a super key, then X is a key - a minimum super...
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