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)gerund

Question

Quizplus · Accepted Answer

A candidate key is a set of attribute(s) that can uniquely identify each instance of an entity type. It is an important concept in database design as it helps in maintaining data integrity and avoiding duplicate entries. Option A is incorrect as a data element occurrence refers to a single instance of an attribute within an entity instance. Option B is also incorrect as a trigger is a set of actions that are automatically executed in response to a particular event or condition. Option D is incorrect as a gerund is a type of word formed by adding "-ing" to a verb and is not related to database design.

An Attribute (Or Combination of Attributes)that Uniquely Identifies Each Instance