This illustration shows an example of one-to-one employee relationship with Auto-ID. There is a table row on the left labeled "EMP" with the following column heads: "empno", "empName", "salary", and "PK:address". On the right, there is a table row labeled "ADDRESS" with the following columns: "autoid", "street", "city", "state", and "ZIP". There is an arrow pointing from the "PK:Address" column in the "EMP" table to the "autoid" column in the "ADDRESS" table.