Question

A domain in a relational database refers to:

• A. The overall database structure
• B. A specific set of valid values for an attribute
• C. A table containing multiple records
• D. A relationship between two tables

Answer 1

The Correct Option is B

A domain in a relational database refers to a specific set of valid values for an attribute.

(1) The overall database structure: This describes the schema, not a single domain.

(2) A specific set of valid values for an attribute: A domain defines the set of possible values that an attribute can take. For instance, the domain of a "gender" attribute might be {"Male", "Female", "Other"}.

(3) A table containing multiple records: This describes a table or relation itself, not a domain.

(4) A relationship between two tables: This describes a relationship, such as a foreign key constraint, not a domain.

Therefore, a domain in a relational database refers to: (2) A specific set of valid values for an attribute.