在《数据库原理》课程的教学中,重点需要学生掌握用基于代数的方法对关系进行查询操作。该文从几个查询实例出发,提出了综合应用关系代数中各种运算列出关系代数表达式的实例教学方法,并在实际的教学过程中验证了这些方法是行之有效的。
In the course of Principle Application of Database,and in order to create theoretical principle of Database quiry for students,it is necessary for students to grasp the means of algebraically-based relational query.But means of how to integrate the application of Relational Algebra operations is still questionable.Therefore,the teaching of Relational Algebra is the pivot and difficulty in the course of Principle Application of Database.In this paper,the means of teaching is put forward by some examples of query,which integrates application with Relational Algebra operations.In teaching process the means is verified to be effective.