In database a key is
Correct answer: B. The most important field in a record
- A. A key that identifies only one record
- B. The most important field in a record
- C. The first field of tha table
- D. Redundant field
Explanation
A Key can be a single attribute or a group of attributes, where the combination may act as a 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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