Question

An alternate key is ________.

• A. Another name for the primary key
• B. A unique identifier besides the primary key
• C. A relationship between two tables
• D. A synonym for a tuple

Answer 1

The Correct Option is B

In database management, an alternate key is a unique identifier distinct from the primary key. This concept is vital because:

1. The primary key serves as the definitive unique identifier for records within a table.
2. An alternate key provides an alternative method for unique record identification, thereby upholding data integrity and facilitating efficient querying, especially when the primary key is less suitable for specific operations.

Considering these points, the accurate definition is A unique identifier besides the primary key, differentiating it from other choices that do not accurately represent the function of an alternate key in database systems.