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A relation will be in 2NF of any of the following condition apply

Correct answer: C. Every non-key attribute is functionally dependent on the full set of primary key attributes

  • A. The primary key consists of only one attribute
  • B. Non-key attribute exists in the relation
  • C. Every non-key attribute is functionally dependent on the full set of primary key attributes
  • D. All of these
  • E. None of these

Explanation

Second normal form (2NF) is a level of database normalization that ensures a relation eliminates partial dependencies. A relation is in 2NF if it satisfies the following conditions:It is in first normal form (1NF), meaning there are no repeating groups of values and all attribute values are atomic (indivisible).Every non-key attribute is fully functionally dependent on the primary key. This means that the value of a non-key attribute can be uniquely determined by the value of the primary key, without relying on any other non-key attribute.

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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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