数据库原理课程教学中几个重难点问题的多解探讨  

The multiple solutions for a few difficult problems in introduction of database

作　　者：马金忠[1] 田彦山[2] 

机构地区：[1]宁夏建设职业技术学院机电信息工程系,宁夏银川750021 [2]宁夏师范学院数学与计算机科学学院,宁夏固原756000

出　　处：《高师理科学刊》2011年第4期90-94,共5页Journal of Science of Teachers＇College and University

基　　金：宁夏自然科学基金资助项目(NZ08113);2009年宁夏高等学校教育教学改革项目(宁教改2009020)

摘　　要：课程中的重点、难点知识点如果能从多个角度解释、用多种方法求解,对学生掌握该知识点有极大帮助.通过论述数据库原理课程教学中关系运算中的除法和关系规范化理论中的候选码求解的多种解(算)法,使学生能够触类旁通、举一反三,更好地掌握该课程中这2个较难的知识点.There are great help for students to master the knowledge point of focus and difficult if teacher explain them from different angles and solve them with variety of methods.Discusses a variety of solutions（calculation） method of the division in the relationship operations and how to solve key code in the relationship normalization theory in the course of theory of database,so that students can comprehend by analogy and replicability and can better grasp the two difficult knowledge point.

关 键 词：除法 候选码 多解 

分 类 号：TP311.13[自动化与计算机技术—计算机软件与理论] G642.0[自动化与计算机技术—计算机科学与技术]