通过学习PL/SQL基础语法和函数、存储过程、包、触发器等数据库对象的概念、基本语法及应用，达到学以致用的目的，并能在应用程序中调用存储函数及过程(By learning basic concepts, basic syntax and application of PL/SQL basic grammar and functions, stored procedures, packages, triggers and other database objects, we can achieve the purpose of learning for practical purposes, and can call stored functions and procedures in application programs.)