Which field type is best suited for unique identification of records?

The auto-number field type is best suited for the unique identification of records because it automatically generates a unique number for each record as it is created. This ensures that every record has a distinct identifier, which is crucial in database management for differentiating one record from another. Auto-number fields eliminate the possibility of duplicates, as the system manages the number assignment and guarantees that each new record receives a unique value without manual intervention.

This automatic generation is particularly useful in scenarios where unique identification is essential, such as tracking user interactions, maintaining inventory levels, or managing user accounts. It also enhances data integrity and reduces errors associated with manually entering identifiers, which could lead to duplications or conflicts.

While text fields, number fields, and email fields can also hold unique values, they do not inherently ensure uniqueness without additional constraints or validation rules being applied. Therefore, the auto-number field stands out as the most reliable choice for unique record identification in a database.