What is a key characteristic of relationships in Third Normal Form?

A key characteristic of relationships in Third Normal Form (3NF) is that it utilizes ID codes to establish relationships among tables. In 3NF, the database is designed in such a way that all non-key attributes are functionally dependent only on the primary key. To facilitate these relationships, ID codes or primary keys are employed, allowing for the linking of tables in a meaningful manner. This helps maintain data integrity and reduces redundancy, as the same ID can be referenced in multiple tables to connect relevant information.

ID codes serve as a unique identifier for each record, enabling straightforward relationships between different entities within the database. This organizational structure is essential for efficient querying and ensures that data can be accurately retrieved and maintained. The use of these ID codes is crucial for establishing a normalized database that adheres to the principles of 3NF, ultimately leading to a more robust and logically coherent data model.