1) aggregation query rewriting
聚集查询重写
1.
Based on the technique of selective join query on inconsistent databases,proposes an approach,which can overcome the obstacles in the field of multi-relations aggregation query rewritings in inconsistent database.
基于非一致性关系数据库的选择连接查询技术,提出了基于非一致性数据库多个关系上的聚集查询重写方法。
2) rewriting query
重写查询
1.
The paper makes an extension to general rewriting query using materialized views considering the hierarchical relation of attributes of dimension tables and discusses the restrict condition of rewriting query using single materialized view,then presents a method of rewriting query.
利用维属性间的层次关系,对一般意义上的实视图重写查询进行了扩展,讨论了单一视图重写查询的限制条件,并给出重写方法,在此基础上,提出了一种利用多个实视图重写查询的优化选择算法,并通过实验表明,该算法进一步提高了分组聚集查询效率。
3) query rewriting
查询重写
1.
Disponse of a regular path expression during the query rewriting;
查询重写过程中正则表达式的处理
2.
A Query Rewriting and Semantic Association Based Algorithm for Ontology Retrieval;
基于查询重写和关联搜索的本体查询算法
4) aggregate query
聚集查询
1.
The key technologies of StarCache about aggregate query processing, cache replacement and consistency maintenance etc.
将目前主要用于小规模数据库查询的语义缓存技术拓展到海量数据库的聚集查询中,以面向聚集查询的语义缓存形式模型为基础,构造了语义缓存StarCache。
2.
However,the existing methods often have the shortcomings of high loss distortion and less aggregate query accuracy on the private or anonymous dataset.
针对已有方法信息损失程度高、聚集查询精度低的不足,在(alpha,k)隐私保护模型基础上,利用关系数据库理论的有损分解思想,提出了一种改进的数据隐私保护方法Alpha+。
5) aggregation query
聚集查询
1.
This paper studies aggregation query whith is an important class of continuous operators,and proposes a kind of novel aggregate query algorithms from sliding window over data streams.
该文研究了基于滑动窗口的数据流聚集查询,提出了一种新的增量聚集查询算法,采用了多种增量计算方法和查询共享技术,实现了多窗口资源共享。
2.
There are many aggregation query on the Massive date-orenited Multi database, and it always be costy.
由于海量数据库应用中存在大量的聚集查询,而且面向海量数据的聚集查询处理又非常耗时,所以如何对海量数据的聚集查询操作进行处理和优化是一项富有挑战的工作。
3.
For its increasing importance in the data warehouse applications, temporal aggregation query have become the focus of the temporal database research.
时态数据库扩展了传统的关系数据库，其中一个重要的扩展就是对于时态聚集查询的支持。
6) XML query rewriting
查询XML重写
补充资料：聚集经济（聚集利益）（聚集效应）
n聚集经济（聚集利益）（聚集效应）是指由于某工业部 n门向某特定地域集中新产生的供生产成本降低的效果。因为分工协作，扩大生 产规模，节约使用基础设施等会降低生产成本。 n
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条