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In a third normal form relation, every ………. attribute is non-transitively and fully dependent on every candidate key.
- a)Prime
- b)non-prime
- c)Unique
- d)Network
Correct answer is option 'B'. Can you explain this answer?
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In a third normal form relation, every ………. attribute is non-transiti...
A table is in 3 NF if and only
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If both following conditions hold:
(a) The table is in 2 NF.
(b) No run-prime attribute of the table is transitively dependent on a candidate key.
A non-prime key attribute is an attribute that doesn’t belong to any candidate key. A transitive dependency X → Z in which Z is not immediately dependent on X, but rather on a third set of attributes Y which depends on X. That is X → Y by virtue of X → Y and Y → Z.
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In a third normal form relation, every ………. attribute is non-transiti...
Prime and Non-Prime Attributes in Third Normal Form
Prime attributes in a relation are those attributes that are part of a candidate key, while non-prime attributes are those that are not part of any candidate key. In a third normal form relation, every non-prime attribute is non-transitively and fully dependent on every candidate key.
Non-Transitive Dependency
Non-transitive dependency means that an attribute is not dependent on another non-prime attribute in the relation. In a third normal form relation, non-prime attributes should be directly dependent on the candidate key and not on any other non-prime attributes.
Full Dependency
Full dependency implies that the non-prime attributes are functionally dependent on the entire candidate key and not just a part of it. This ensures that each non-prime attribute is uniquely determined by the candidate key and not by any subset of the key.
Therefore, in a third normal form relation, every non-prime attribute should be non-transitively and fully dependent on every candidate key to maintain data integrity and eliminate anomalies. This helps in organizing the data in a structured manner and reduces redundancy in the database design.
Prime attributes in a relation are those attributes that are part of a candidate key, while non-prime attributes are those that are not part of any candidate key. In a third normal form relation, every non-prime attribute is non-transitively and fully dependent on every candidate key.
Non-Transitive Dependency
Non-transitive dependency means that an attribute is not dependent on another non-prime attribute in the relation. In a third normal form relation, non-prime attributes should be directly dependent on the candidate key and not on any other non-prime attributes.
Full Dependency
Full dependency implies that the non-prime attributes are functionally dependent on the entire candidate key and not just a part of it. This ensures that each non-prime attribute is uniquely determined by the candidate key and not by any subset of the key.
Therefore, in a third normal form relation, every non-prime attribute should be non-transitively and fully dependent on every candidate key to maintain data integrity and eliminate anomalies. This helps in organizing the data in a structured manner and reduces redundancy in the database design.
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In a third normal form relation, every ………. attribute is non-transitively and fully dependent on every candidate key.a)Primeb)non-primec)Uniqued)NetworkCorrect answer is option 'B'. Can you explain this answer?
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