A ____ key uniquely identifies every record in a relational database.
A)secondary
B)foreign
C)primary
D)surrogate

Question

Quizplus · Accepted Answer

The primary key is a column (or group of columns) in a table that uniquely identifies each row in the table. It must contain unique values and cannot contain null values. Secondary keys are additional indexes created to improve query performance, while foreign keys are used to enforce referential integrity between tables. Surrogate keys are artificially generated keys used to uniquely identify a record when a natural key does not exist or is not appropriate.

A ____ Key Uniquely Identifies Every Record in a Relational