Derby allows you to create triggers. When you create a trigger, you define an action or set of actions that are executed when a database event occurs on a specified table. A database event is a delete, insert, or update operation.
For example, if you define a trigger for a delete on a particular table, the trigger action is executed whenever someone deletes a row or rows from the table.
The CREATE TRIGGER statement in the Java DB Reference Manual goes into detail of the complete CREATE TRIGGER syntax. This section provides information on defining the trigger action itself, which is only one aspect of creating triggers.
This section refers to the CREATE TRIGGER statement as the trigger actions.