Create Trigger JD Edwards
1.Check out the table to which you want to attach event rules and click Design.
2.On the Table Design form, select the Design Tools tab and click Start Table Trigger Design Aid.
3.Select an event from the Events list.
4.On Event Rules Design, click one of the event rule buttons and complete the event rules.
5.Click Save to save the event rule specifications and then click Close.
6.If you are creating a new table in Oracle's JD Edwards EnterpriseOne Table Design Aid, select the Table Operations tab and click Generate Table.
http://download.oracle.com/docs/cd/E17984_01/doc.898/e14702/createtableeventrules.htm