Define Boyce-Codd normal form. How does it differ from 3NF? Why is it considered a stronger form of 3NF?
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Answer:
Boyce Codd normal form (BCNF)
BCNF is the advance version of 3NF. It is stricter than 3NF. A table is in BCNF if every functional dependency X → Y, X is the super key of the table. For BCNF, the table should be in 3NF, and for every FD, LHS is super key.
BCNF is a stronger form of normalization than 3NF because it eliminates the second condition for 3NF, which allowed the right side of the FD to be a prime attribute. Thus, every left side of an FD in a table must be a superkey. Every table that is BCNF is also 3NF, 2NF, and 1NF, by the previous definitions.
Explanation:
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Answer:
BCNF is considered a stronger form of 3NF because it more strictly enforces the principles of normalization, which helps to avoid anomalies and maintain data integrity.
Explanation:
From the above question,
They have given :
Boyce-Codd normal form (BCNF) is an enhanced version of the Third Normal Form (3NF).
It is a higher level of normalization that requires that every determinant of a relation be a candidate key.
BCNF is stronger than 3NF in the sense that the determinants of a relation are the only candidate keys, meaning that they must be single attributes or combinations of attributes that uniquely identify a row in the relation. This ensures that any non-prime attribute is fully dependent upon the candidate key, eliminating the possibility of anomalies caused by transitive dependencies.
BCNF is considered a stronger form of 3NF because it more strictly enforces the principles of normalization, which helps to avoid anomalies and maintain data integrity.
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