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How databases can be integrated with other new technologies - Triggers
Triggers
Triggers are event-driven specialized procedures that are attached to database tables. The trigger code is automatically executed by the RDBMS as data changes in the database. Each trigger is attached to a single, specified table. Triggers can be thought of as an advanced form of rule or constraint that uses procedural logic. A trigger cannot be directly called or executed; it is automatically executed (or "fired") by the RDBMS as the result of a SQL INSERT, UPDATE, or DELETE statement issued on its associated table. Once a trigger is created, it is always executed when its firing event occurs.
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