The super key without any extra attribute is called
Correct answer: A. The candidate key
- A. The candidate key
- B. Primary key
- C. Foreign key
- D. Sort key
Explanation
A candidate key is a combination of attributes that can be uniquely used to identify = database record without referring to any other data. Each table may have one or more candidates. One of these candidate keys is selected as the table primary key. The attribute or combination of attributes that uniquely identifies or row or record in relation is known as the primary key.
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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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