When you create a Microsoft Access table, Access will automatically create a primary key to your database table. Still, you can also specify the field you want as the primary key for your database ...

One of the principles within relational theory is that each entity’s row or tuple be uniquely identifiable. This means the defined structure includes some combination of attributes whose populated ...

The column (field) in a relational database that uniquely identifies the row in the table. For example, account number is often a primary key. A "composite primary key" or "super key" is made up of ...