A primary key in a database is a ________.
A) group of rows that identifies a unique table or file
B) column or group of columns that identifies a unique row in a table
C) group of fields or columns that represent metadata
D) group of tables or files formed to identify a unique field or row
E) group of records that identifies similar attribute

Question

Quizplus · Accepted Answer

A primary key is a column or group of columns that uniquely identify each row in a table. It is used to enforce data integrity by ensuring that each row in a table is uniquely identified and can be accessed efficiently.

A Primary Key in a Database Is a ________