三种除运算算法的效率分析

Analysis of Efficiency of Three Division Operation Algorisms

除运算是关系代数八种运算之一,也是关系数据库中的一种重要的数据查询方法,因此了解不同除运算算法的效率对于初学者和数据库应用系统的开发人员都有重要的意义。从两个角度对三种除运算算法的效率进行横向比较,并分析测试结果,为使用者在选择除运算算法时提供帮助。

The division operation is one of the eight operations in relational algebra, also a major data query method in relation database. So it is important to know the efficiency of different division operation algorisms for the primers and database developers. Analyzes three division operation algorisms＂ efficiency in 2 directions to help the useI~ to choose the right one.