说明：  《Oracle9i PL/SQL程序设计》这本书的对象是有一定经验或有专业支持的Oracle 9i数据库的相关技术人员，并提供了一些实例。
(" Oracle9i PL/SQL Programming" This book is targeted at those with some experience or expertise to support the Oracle 9i database, the relevant technical staff, and provides some examples.)