3. Disprove the following rule: {B > CD, AB → E, E → C} |= {AE → CD} To disprove a rule, construct a relation with attributes (A, B, C, D, E) and some tuples such that the tuples of the relation satisfy the functional dependencies on the left-hand side of the rule (left of |=) but do not satisfy the functional dependency on the right-hand side of the rule.

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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3.
Disprove the following rule:
{B > CD, AB > E, E > C} |= {AE → CD}
To disprove a rule, construct a relation with attributes (A, B, C, D, E) and some tuples such that the
tuples of the relation satisfy the functional dependencies on the left-hand side of the rule (left of |=)
but do not satisfy the functional dependency on the right-hand side of the rule.
Transcribed Image Text:3. Disprove the following rule: {B > CD, AB > E, E > C} |= {AE → CD} To disprove a rule, construct a relation with attributes (A, B, C, D, E) and some tuples such that the tuples of the relation satisfy the functional dependencies on the left-hand side of the rule (left of |=) but do not satisfy the functional dependency on the right-hand side of the rule.
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