Binding a default to a table column
Select the Columns folder for the table you are working with.
Select a column, then choose File | Properties.
Select the Rules and Defaults tab.
Select Binding (Bind with defaults defined in database) or select Value (User-defined value).
If you selected Binding (Bind with defaults defined in database), select a default from the drop-down list. If you selected Value (User-defined value), enter the text of the default expression in the text box.
The default clause must be a valid constant expression
that is compatible with the datatype of the column. The constant
expression cannot include the name of any columns or other database
objects, but can include built-in functions that do not reference
database objects. Enclose strings in double quotes.