Answer:
True
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).
Answer:
The statement is: True.
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).
