إجابتك PWhich of these relations on {0, 1, 2, 3} are equivalence relations a) {(0, 0), (1, 1), (2, 2), (3, 3)} b) {(0, 0), (0, 2), (2, 0), (2, 2), (2, 3), (3, 2), (3, 3)} c) {(0, 0), (1, 1), (1, 2), (2, 1), (2, 2), (3, 3)} d) {(0, 0), (1, 1), (1, 3), (2, 2), (2, 3), (3, 1), (3, 2), (3,3)} هذا السؤال مطلوب

إجابتك PWhich of these relations on {0, 1, 2, 3} are equivalence relations a) {(0, 0), (1, 1), (2, 2), (3, 3)} b) {(0, 0), (0, 2), (2, 0), (2, 2), (2, 3), (3, 2), (3, 3)} c) {(0, 0), (1, 1), (1, 2), (2, 1), (2, 2), (3, 3)} d) {(0, 0), (1, 1), (1, 3), (2, 2), (2, 3), (3, 1), (3, 2), (3,3)} هذا السؤال مطلوب

Database Systems: Design, Implementation, & Management

12th Edition

ISBN:9781305627482

Author:Carlos Coronel, Steven Morris

Publisher:Carlos Coronel, Steven Morris

Chapter4: Entity Relationship (er) Modeling

Section: Chapter Questions

Problem 20RQ: Describe precisely the composition of the DEPENDENT weak entitys primary key. Use proper terminology...

See similar textbooks

Similar questions

(10) Discrete Structure: Please solve it on urgent basis: Question # 10 : For each of these relations on the set {1, 2, 3, 4}, decidewhether it is reflexive, whether it is symmetric, whetherit is anti-symmetric, and whether it is transitive. a) {(2, 2), (2, 3), (2, 4), (3, 2), (3, 3), (3, 4)} b) {(1, 1), (1, 2), (2, 1), (2, 2), (3, 3), (4, 4)} c) {(2, 4), (4, 2)}
Identify each relation on N as one-to-one, one-to-many, many-to-one, or many-to-many. (a) R = {(1, 6) , (1, 4) , (1, 6) , (3, 2) , (3, 4)}(b) R = {(12, 5) , (8, 4) , (6, 3) , (7, 12)}(c) R = {(2, 7) , (8, 4) , (2, 5) , (7, 6) , (10, 1)}(d) R = {(9, 7) , (3, 4) , (3, 6) , (2, 4)}
The reflexive and transitive closure of the relation A = {(0,1),(1,2)} on B = {0,1,2} is {(0,1),(1,0),(1,2),(2,1)} {(0,0),(1,1),(2,2)} {(0,1), (1,2)} {(0,1),(0,2),(1,2)} {(0,2)} {(0,0),(0,1),(0,2),(1,0),(1,1),(1,2),(2,0),(2,1),(2,2)} {(0,0),(0,1),(0,2),(1,1),(1,2),(2,2)}
Consider the set A={1, 2, 3, 4, 5, 6}. Draw the Hasse diagram for the relation R={(1,1), (1,3), (1,4), (1,5), (1,6), (2,2), (2,3), (2,4), (2,5), (2,6), (3,3), (3,4), (3,5), (3,6), (4,4), (4,5), (4,6), (5,5), (6,6)}.
Consider the relation R(O,P,X,Y,E, S); FDs={ O->P, XY->O, OE->S, EY->X, PY->X} What is the lossless (or nonadditive) join property of a decomposition? Why is it important? Determine whether each of the decompositions has the lossless join property with respect to F and conclude for the whole decomposition Determine whether each of the decompositions has the dependency preserving property with respect to FD and conclude for the whole decomposition
We studied different properties of relations like reflexive, symmetric, antisymmetric, transitive. Please provide one example relation each for each property of the relation. Try to come up with original examples which can be seen practically. (Example, Reflexive relation R = {(a, b) | a and b share same birthday}, Symmetric relation R = {(a, b) | a and b are friends}, Antisymmetric relation R = {(a, b) | a is instructor of b}, Transitive relation R = {(a, c) | a is sibling of b, b is sibling of c, then a is sibling of c}
Compute a canonical cover Fc of F = { A → E, BC → D, C → A, AB → D, D → G, BC → E, D → E, BC → A }, given a relation-schema R(A, B, C, D, E, G). If you can, please include the steps you use to reach with what Armstrong axioms you use to simplify. Please give proper explanation and typed answer only.
A relation, R, on non-empty set A is defined as a subset of A × A: R ⊆ A × A For example, let A = {1, 2, 3} then Cartesian product A × A = {(1,1), (1,2), (1,3), (2,1), (2,2), (2,3), (3,1), (3,2), (3,3)}. A binary relation R ⊆ A × A Briefly explain the meaning of the relation, providing an example (and diagram): (i)) Discuss the real-life applications of binary relations
Please give step by step solution so i can fully understand. I a unsure how to go about solving this. Thank you in advance for your help! Question: Find at least 5 candidate key for the given relation by closureR(A,B,C,D,E,F)AB->CC->DD->BEE->FF->A
Suppose that we have the following four tuples in a relation S with three attributes ABC: (1,2,3), (4,2,3), (5,3,3), (5,3,4). Which of the following functional (-->) and multivalued (-->>) dependencies can you infer does not hold over relation S? a) A-->Bb) A-->>Bc) BC-->Ad) BC-->>Ae) B->Cf) B-->>C
Given a set A = {1, 2, 3, 4}, which of the following relations is a partial order relation andwhich is not? Justify your answer(a) { (1, 2), (2, 3), (1, 3), (4, 3) }(b) { (1, 2), (2, 3), (1, 3), (3, 4), (1, 1), (2, 2), (3, 3), (4, 4) }(c) { (1, 2), (2, 3), (1, 3), (4, 3), (1, 1), (2, 2), (3, 3), (4, 4) }
1) What are the canidate keys 2) waht is the canonical cover of this relation