Multivalued dependencies should be eliminated in relations
Correct answer: C. Always
- A. Seldom
- B. Never
- C. Always
- D. Commonly
Explanation
In relational database design, a multivalued dependency (MVD) occurs when a single value in one attribute determines a set of possible values in another attribute, even after considering the whole primary key. This can lead to data redundancy and inconsistencies. Third Normal Form (3NF) is a level of database normalization that specifically aims to eliminate multivalued dependencies. By ensuring that all non-key attributes depend solely on the entire primary key, 3NF prevents a single value in one attribute from dictating multiple values in another. This helps to streamline data organization and reduce the risk of errors
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About Databases
Databases cover tables, records, fields, keys and relationships, together with database management systems and relational database design. The subject includes primary and foreign keys, normalization, SQL commands such as SELECT, INSERT, UPDATE and DELETE, queries, forms and reports, while distinguishing a database from a spreadsheet used for simple tabular data.
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