If a table is in Third Normal Form (3NF), which of the following must be true?Group of answer choicesIt has no transitive dependenciesAll attributes are functionally dependent on the primary keyIt is in 1NF and 2NFAll the Available Options
Question
If a table is in Third Normal Form (3NF), which of the following must be true?Group of answer choicesIt has no transitive dependenciesAll attributes are functionally dependent on the primary keyIt is in 1NF and 2NFAll the Available Options
Solution
All of the above options must be true for a table to be in Third Normal Form (3NF).
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It has no transitive dependencies: This means that there is no non-prime attribute that depends on another non-prime attribute. A non-prime attribute of a table is an attribute that is not a part of any candidate key of the table.
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All attributes are functionally dependent on the primary key: This means that if you know the value of the primary key, you can determine the value of any other attribute in the table.
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It is in 1NF and 2NF: Before a table can be in 3NF, it must first meet the criteria for 1NF and 2NF. 1NF requires that the values in each column of a table are atomic (indivisible). 2NF requires that every non-prime attribute is fully functionally dependent on the primary key.
So, all the available options are correct.
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
Which normal form deals with the elimination of transitive dependencies?Question 10Answera.Boyce-Codd Normal Form (BCNF)b.Third Normal Form (3NF)c.First Normal Form (1NF)d.Second Normal Form (2NF)
A given table which does not have a transitive dependency and is in the second normal form is known to be in the A. Third normal form B. General form C. Second normal form D. First normal form
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
Which of the following is true for a relation in First Normal Form (1NF)?Question 13Answera.It contains no repeating groups or arraysb.It has a primary keyc.All attributes depend on the whole primary keyd.It contains no transitive dependencies
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