A yes/no, on/off or true/false selection that is stored as a 1 or 0. For example, a check box stores the value 0 if the box isn't checked, and 1 if it is checked.

Control types

Check box, radio button

The values of radio buttons aren't stored in tables and can't be imported; rather, an integer value for the radio group containing the buttons is stored.

How stored in tables

0 or 1