Question

A primary key is a column that holds a unique value for each row, and can be used to identify specific rows? (true/false)

Answer 1

The statement is: True.

Step-by-step explanation:

A primary key is useful to identify each row within a table. The primary key constraint makes sure rows are unique since they can be used once per table and it cannot be blank, a "null" value or duplicated. The content of the table typically represents information that should not be repeated such as individuals' full name, phone number or Social Security Number (SSN).

Answer 2

True

Step-by-step explanation:

A primary key is a key in relational databases used to identify rows in a table. A primary key is a non-null and unique identifier, therefore, every row has its own and unique primary key.

Examples of primary keys are: passport number, driver license number, telephone number with area code, and identification number (IDs).