In a relational database, what field links all the data within a record to a unique value?

A.
Cell

B.
Row

C.
Primary key

D.
Column key

Explanation:
A relational database is composed of two-dimensional tables, and each table contains unique rows, columns, and cells (the intersection of a row and a column). Each cell contains only one data value that represents a specific attribute value within a given tuple. These data entities are linked by relationships. The relationships between the data entities provide the framework for organizing data. A primary key is a field that links all the data within a record to a unique value.