A(n)____ is a column or set of columns that uniquely identify each row.
A) segment
B) partition
C) primary key
D) index

Question

Quizplus · Accepted Answer

The primary key is a column or set of columns that uniquely identify each row in a table. This means that no two rows can have the same primary key value. The primary key is used to enforce entity integrity, which ensures that each row in a table is unique and has a unique identifier. A segment and partition are not related to identifying rows, and an index is a data structure used to speed up queries, but it is not necessarily unique to each row.

A(n)____ Is a Column or Set of Columns That Uniquely