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
E)dependency

Question

Quizplus · Accepted Answer

A key is a combination of one or more columns used to identify particular rows in a relation. It uniquely identifies a tuple in a relation. A record is a collection of fields that describe an entity. A field is a single piece of data within a record. A tuple is a row in a database table that contains data about a specific item or entity. A dependency is a relationship between two or more attributes in a relation.

A Combination of One or More Columns Used to Identify