A ________ is a column or group of columns that identifies a unique row in a table.
A) field
B) byte
C) file
D) key

Question

Quizplus · Accepted Answer

A key is a column or group of columns that uniquely identifies a row in a table. It is used to enforce data integrity and is often used as a reference for linking tables together in a relational database. A field is a single piece of data stored in a column, a byte is a unit of measurement for digital data, and a file is a collection of related data stored on a computer.

A ________ Is a Column or Group of Columns That