The Foreign Keys tab is divided into two sections, one with a list of foreign keys and one with various dialog boxes for foreign key settings.

To add a foreign key, click the + (plus) button below the foreign key list. A dialog box prompts for a foreign key name and the new foreign key is created. Under Windows, you can change the automatically generated foreign key name by using the Options dialog window. For more information, see Section 21.5, “Editors”.

To drop a foreign key, select the foreign key and click the – (minus) button below the foreign key list.

You can modify the name of the foreign key, its ON DELETE, and its ON UPDATE actions using the dialog boxes provided in the Foreign Key Settings section of the tab.

The options are:

To establish a foreign key relationship, choose a table from the Ref. Table drop-down list. (Under Linux this list box is called Refer. Table.) The fields that can be related to create a foreign key are listed in the frame below the drop-down list. This frame contains two columns; one labeled Column and the other Reference Column. To select a column as a foreign key, double click the area below Column and select a column from the drop-down list. Alternately, drag a column from the column editor to the Column section. To add a related column from the referenced table, double click the area below Reference Column and select the related column from the drop-down list.