期刊名称：Journal of Computer Sciences and Applications
印刷版ISSN：2328-7268
电子版ISSN：2328-725X
出版年度：2015
卷号：3
期号：1
页码：18-22
DOI：10.12691/jcsa-3-1-3
语种：English
出版社：Science and Education Publishing
摘要：In heterogeneous multiple query processing environments, usually the query processors depend upon estimated database cardinalities when evaluating the cost of the query plans. In this paper it is being projected to retrieve query plans along with their costs and fitness values by applying join selectivity techniques for relations used in query processing by applying genetic algorithm techniques. It has also been aimed to see that whether the evaluation of selectivity factor of sub query operation may be feasible and may reduce the total query cost.
