Setting Default Value in Decision Table Column

Using the Field Settings option of the column, you can set a default expression for the column for all new rules.

Procedure

Select the Field Settings option.
The Field Settings dialog is displayed.
Enter the default value for the column in the Default Expr text box.
This default value is used for the column, whenever you add a new row.

The Include existing rules check box is activated.
Select the Include existing rules check box to fill all the blank cells for the column with the default value specified in the Default Expr text box.
Click OK.
The Field Settings dialog closes.

Result

Now the value of the Default Expr field is used as the default value for the column for new rules. If you have selected the Include existing rules check box, all empty cells for the column in the decision table are replaced by the default value.