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6.2.7 Triggers


   Triggers represent an action performed by the RDBMS when a certain table is changed. Triggers are associated to the Table they monitor and are owned by a Schema, which may or may not be the same as the Schema owning the table. In addition, Triggers that use tables in their expressions are associated with them.

   Nam edColum nSet

   Table Schema

   table


/nam espace

   



usedColumnSet



   


trigger {ordered} /ownedElement

   




   Trigger

   usingTrigger





   Figure 6-11 Triggers