Which statement best describes the purpose of Second Normal Form (2NF)?a.2NF allows redundancy to be eliminated completely from the relationb.2NF allows for the nesting of relations within relations, enhancing data organizationc.2NF ensures that every non-prime attribute is fully functionally dependent on the entire candidate key, thus removing partial functional dependenciesd.2NF ensures that every attribute in the relation is functionally dependent on the primary key
Question
Which statement best describes the purpose of Second Normal Form (2NF)?a.2NF allows redundancy to be eliminated completely from the relationb.2NF allows for the nesting of relations within relations, enhancing data organizationc.2NF ensures that every non-prime attribute is fully functionally dependent on the entire candidate key, thus removing partial functional dependenciesd.2NF ensures that every attribute in the relation is functionally dependent on the primary key
Solution
The statement that best describes the purpose of Second Normal Form (2NF) is: "2NF ensures that every non-prime attribute is fully functionally dependent on the entire candidate key, thus removing partial functional dependencies". This is because 2NF is all about removing partial dependencies, i.e., ensuring that non-prime attributes (those not part of any candidate key) are dependent on the whole of every candidate key, not just part of it.
Similar Questions
When is a relation considered to be in second normal form (2NF)? (Select the best answer.)Select one:a.When there are no repeating groups in a relationb.When there are no transitive functional dependenciesc.When there are no dependencies on part of the primary keyd.When there are no dependent attributes in transitive relation
WHAT IS TRUE ABOUT 2NF?Select one:a. BOTH OF THE ABOVEb. RELATION SHOULD BE IN 1NF.c. ALL ATTRIBUTES OTHER THAN PRIMARY KEY ARE FULLY FUNCTIONALLY DEPENDS ON PRIMARY KEYd. NONE OF THE ABOVE
What is TRUE about the Third Normal Form (3NF)?a.All of the answerb.Data duplication is reduced by using 3NFc.When a relation is in 2NF and does not contain transitive partial dependencies, it will be in 3NFd.It helps maintain the integrity of the data
When is a relation considered to be in first normal form (1NF)?Select one:a.When there are no dependencies of an attribute on another attribute in the tableb.When there are no compound primary keys or partial key that can have a null valuec.When there are no partial dependencies or transitive dependencies on a primary keyd.When there are no repeating groups of values of an attribute in one or more columns
2NF relations are those that are in 1NF with all the attribute types dependent on the ___ key.a.Compositeb.Primaryc.Foreignd.Alternate
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