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该文对触发器的概念和功能作了详细的介绍,并针对 ORACLE数据库,举例说明如何在信息 管理系统中应用触发器.“,”This article mainly introduce the conception and functions of the trigger which is often used in the large-scale database systems, such as ORACLE.SYBASE and so on. And then an example is taken to explain the application in an information management system.