In a relational database, every record must be uniquely identified by a__________.
A) primary key
B) super key
C) remote key
D) candidate key
E) Select

Question

Quizplus · Accepted Answer

A primary key is a unique identifier for each record in a relational database. It must be unique, non-null, and should not change over time. No two records in a table can have the same primary key value. This makes it ideal for use in accessing and indexing data.

In a Relational Database, Every Record Must Be Uniquely Identified