摘要
提出了一种查询优化算法,通过本算法,可以有效地减少查询语句的分支和数量以及IF条件语句的嵌套层数,大大提高了程序代码的可读性,通过分析研究该算法并未降低程序的运行效率。
This article comes up with an query optimization algorithm. The branch and number of query sentence as well as layer number of IF sentence nesting can be decreased via this algorithm effectively. Also the readability of programming code can be improved efficiently via this algorithm. The analysis and research on this algorithm indicates that running efficiency of program has not been reduced.
出处
《首都师范大学学报(自然科学版)》
2007年第2期23-27,共5页
Journal of Capital Normal University:Natural Science Edition
基金
北京市教委项目(KM200510028018)
关键词
数据库
条件查询
优化
database, condition query, optimization.