A combination of one or more columns used to identify particular rows in a relation is a ________.
A)record
B)field
C)key
D)tuple

Question

Quizplus · Accepted Answer

A key is a set of one or more columns used to identify particular rows in a relation. It is used to enforce uniqueness in a relation and establish relationships between tables. A record refers to a set of fields that contain data about a single entity, while a field refers to a single data item in a table. A tuple is a synonym for a row in a relation.

A Combination of One or More Columns Used to Identify