Question

how does 5nf differ from 4nf? a.) 5nf has no multivalued dependencies. b.) 5nf does not contain any join dependencies. c.) 5nf is more practical in real-world settings. d.) there is no difference between the two.

Answer 1

5NF and 4NF are both normal forms in database design. The difference is that 5NF does not contain any join dependencies. Therefore, the correct answer is b.) 5NF does not contain any join dependencies.

Step-by-step explanation:

5NF (Fifth Normal Form) and 4NF (Fourth Normal Form) are both normal forms in database design that aim to eliminate data redundancy and improve data integrity.

The difference between 5NF and 4NF is that 5NF eliminates join dependencies in addition to other types of dependencies, while 4NF does not. Join dependencies occur when a relation can be split into two or more relations, and the original relation can be reconstructed by joining these smaller relations together.

Therefore, the correct answer is b.) 5NF does not contain any join dependencies.