此代码为利用PL/SQL开发数据库存储过程的典型示例，此为第5部分，希望大家可以通过该代码清楚如何利用SQL语句实现复杂的业务逻辑。请大家注意：每一部分看起来形式相近，但有微小差别，希望大家仔细浏览。-this code for the use of PL/SQL stored procedures development of the database of typical examples of this Part 5 We can hope that the adoption of the code clearly how to use SQL to achieve complex business logic. Please note : each part appears to form similar, but minor differences, we hope that careful here.