An attribute (or combination of attributes) that uniquely identifies each instance of an entity type defines:
A) data element occurrence.
B) trigger.
C) candidate key.
D) associative entity.
E) data marker.

Question

Quizplus · Accepted Answer

A candidate key is a minimal set of attributes (or combination of attributes) that uniquely identifies each instance of an entity type. Therefore, it fits the given definition. The other options do not fit the definition as follows: A) Data element occurrence refers to a single instance of a data element. B) A trigger is a type of stored procedure that responds to an event, such as an update to a table. D) An associative entity is used to link two or more entities together in a many-to-many relationship. E) Data marker is not a commonly used term in database design.

An Attribute (Or Combination of Attributes) That Uniquely Identifies Each