What is a unique identifier associated with each record in an input table called?

The term used to describe a unique identifier associated with each record in an input table is RecordID. This identifier serves as a primary key and ensures that each entry can be distinctly recognized and accessed within the database.

In database management, unique identifiers are crucial because they prevent duplication of records and facilitate efficient data retrieval and manipulation. The RecordID is typically assigned in a way that guarantees uniqueness across all entries, allowing for reliable referencing when querying or updating data.

While other options suggest identifiers, they either do not conform to standard naming conventions used in database management or lack the clarity and recognition that "RecordID" embodies in the context of databases.