摘要： 阐述了触发器的基表、触发事件和触发器的动作设置，并用具体实例说明了触发器的设计过程。

关键词: 触发器, 参照完整性, 数据更新事件, 触发器动作

Abstract: This paper describes the base table. the event which causes a trigger to fire and the action of the trigger.It also gives examples to state the whole process.of programming trigger.

中图分类号: 

• TP311