Functional dependencies are a generalization of
Correct answer: A. Key dependencies
- A. Key dependencies
- B. Relation dependencies
- C. Database dependencies
- D. View
Explanation
Functional dependencies are a fundamental concept in relational database design. They define a relationship between attributes in a table, specifying that the value of one attribute (or set of attributes) determines the value of another attribute (or set of attributes). This helps to understand how data relates within a table and avoid data redundancy. Key dependencies are a specific type of functional dependency where a minimal set of attributes (the candidate key) uniquely identifies each row in a table. Functional dependencies are more general than key dependencies because they can encompass relationships between any sets of attributes, not just the 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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