Functional dependency preservation

Functional dependency preservation refers to maintaining the relationships between data attributes during database normalization. Specifically, when a database is broken into smaller tables to reduce redundancy, this concept ensures that all the original rules linking data fields remain intact. If these dependencies are preserved, it remains possible to retrieve accurate and complete information about how data pieces relate without needing to join multiple tables frequently. This helps maintain data integrity and simplifies data updates, ensuring the database continues to function correctly and efficiently after restructuring.