Which statement is correct regarding the DurableKey in snapshot tables?

The DurableKey in snapshot tables is designed to provide a consistent identifier for the entity it represents. This means that it remains constant for all rows associated with the same entity across different data extracts. By maintaining the same DurableKey for the same entity, it allows for stable reference and reliable tracking of the data related to that entity over time. This stability is crucial in ensuring that any analyses or reporting based on those keys yield consistent results, particularly when combining or comparing datasets.

While the concept of unique identification may apply to certain contexts, such as each patient having their own DurableKey to distinguish them from others, it is the constancy of the DurableKey across all rows for a given entity that is vital for maintaining data integrity within snapshot tables. This characteristic aids in accurately connecting related records and maintaining the relationships in the dataset without confusion over identifier changes.