On the navigation pane on the left, click the table that contains the field size you want to change. Then click the Design view.. By default, Access will add a Primary key to your table, but in ...

A primary key is a field used to uniquely identify every record in the database. Sometime primary keys are obvious, for example a car license plate could be used to uniquely identify cars. Often ...

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 ...