摘要
在关系代数中,除法运算是较难理解和掌握的一种运算。文中通过对除法的一般定义及算法的介绍,提出了一种新算法———相交算法。通过实例,对新旧算法做了比较,证明了新算法的容易理解、计算速度快和效率高等优点,为提供一种更为简便且容易理解的学习方法做了有益尝试。
In relational algebra,the division operation is difficult to understand and master a kind of operation.Based on the division of the general definition and algorithm,a new algorithm is presented—intersection algorithm.Through the examples,on the old and the new algorithm to do the comparison,the new algorithm is easy to understand,fast calculation speed and high efficiency,to provide a more simple and easy to understand learning method made beneficial attempt.
出处
《河南机电高等专科学校学报》
CAS
2012年第6期31-32,40,共3页
Journal of Henan Mechanical and Electrical Engineering College
关键词
关系代数
除法运算
相交算法
relational algebra
division
intersection algorithm
