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Choose the correct answerWhich normal form is considered adequate for normal relational database design?Options5NF2NF4NF3NF

Question

Choose the correct answerWhich normal form is considered adequate for normal relational database design?Options5NF2NF4NF3NF

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Solution

To determine the correct answer, we need to understand the different normal forms in relational database design.

  1. 1NF (First Normal Form): This normal form ensures that each column in a table contains only atomic values, meaning that it cannot be further divided into smaller pieces. It eliminates duplicate rows and establishes a primary key.

  2. 2NF (Second Normal Form): In addition to meeting the requirements of 1NF, this normal form eliminates partial dependencies. It means that all non-key attributes must depend on the entire primary key, rather than just a part of it.

  3. 3NF (Third Normal Form): This normal form builds upon 2NF and eliminates transitive dependencies. It means that non-key attributes should not depend on other non-key attributes.

  4. 4NF (Fourth Normal Form): This normal form further refines the design by eliminating multi-valued dependencies. It means that a table should not contain multiple independent sets of multi-valued facts about an entity.

  5. 5NF (Fifth Normal Form): Also known as Project-Join Normal Form (PJNF), this normal form deals with join dependencies. It ensures that a database is free from redundancy and anomalies caused by join operations.

Based on the options provided, the correct answer for the normal form considered adequate for normal relational database design is 3NF (Third Normal Form).

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Similar Questions

Choose the correct answerWhich forms has a relation that possesses data about an individual entity:Options4NF3NF2NF5NF

Select the correct answerWhich normal form ensures that there are no repeating groups of data and all non-key attributes are fully functionally dependent on the primary key?OptionsSecond Normal Form (2NF)First Normal Form (1NF)Third Normal Form (3NF)Boyce-Codd Normal Form (BCNF)

Choose the correct answerWhich one of the following statements about normal forms is FALSE?OptionsLossless, dependency–preserving decomposition into BCNF is always possibleLossless, dependency-preserving decomposition into 3 NF is always possibleBCNF is stricter than 3 NFAny relation with two attributes is BCNF

If a table is in Third Normal Form (3NF), which of the following must be true?Group of answer choicesIt is in 1NF and 2NFAll attributes are functionally dependent on the primary keyAll the Available OptionsIt has no transitive dependencies

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

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