Moderate

In which normal form is a composite attribute converted to individual attributes?

Correct answer: A. First

  • A. First
  • B. Second
  • C. Third
  • D. Fourth

Explanation

First Normal Form (1NF) is the foundational level of database normalization. A table is considered to be in 1NF if it meets the following criteria:Eliminates repeating groups: Each cell in a table should contain a single atomic value, not a list of values. This prevents data redundancy and simplifies data manipulation.Defines all key attributes: The table must have a primary key, which can be a single attribute or a composite key consisting of multiple attributes, that uniquely identifies each record.Ensures all attributes are dependent on the primary key: Every non-key attribute (column) in the table should be fully reliant on the primary key. The value of a non-key attribute can be determined solely by the value of the primary key.By decomposing composite attributes into individual atomic values, 1NF lays the groundwork for a well-organized database structure In conclusion, converting composite attributes into individual attributes is a core principle of achieving First Normal Form (1NF) in database normalization. This initial step lays the foundation for further normalization to minimize redundancy and improve data integrity.

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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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