Question

question 5. select correct statement(s) regarding boyce-codd norm form (bcnf): a. a condition under which anomalies do not exist and the left-hand side of any nontrivial functional dependencies is also a super key. b. a condition under which anomalies do not exist and the right-hand side of any nontrivial functional dependencies is also a super key. c. a condition under which anomalies do not exist and closure of the left-hand side of any nontrivial functional dependencies includes all attributes in the relation. d. a condition under which anomalies do not exist and closure of the right-hand side of any nontrivial functional dependencies includes all attributes in the relation. e. a condition under which anomalies do not exist and set of attribute(s) in the left-hand side of any nontrivial functional dependencies can determine all attributes in the relation.

Answer 1

The correct statement regarding Boyce-Codd Normal Form (BCNF) is: a. A condition under which anomalies do not exist, and the left-hand side of any nontrivial functional dependencies is also a super key.

Boyce-Codd Normal Form (BCNF) ensures a relational database's structural integrity by eliminating certain types of anomalies. The correct statement is (a): BCNF is achieved when anomalies are absent, and the left-hand side of any nontrivial functional dependencies functions as a super key.

This implies that there are no insertion, update, or deletion anomalies, and the relations maintain integrity by preventing redundancy.

The closure of the left-hand side uniquely identifies the tuple, promoting efficient data organization. BCNF is a higher normal form than 3NF, emphasizing the importance of nontrivial functional dependencies and super keys to enhance data integrity and eliminate redundancy in relational database design. Option A is the answer.