同时给出了查询代价视图选择问题的代价模型和实视图选择的过程。
In the meantime, the cost model of the query cost view selection problem and the process of materialized views selection are presented.
同时，层次聚集cube也可以看作是实视图的物化，可以根据某种策略进行动态调整。
Furthermore, the hierarchical cluster CUBE can be regarded as materialize of real view which can be dynamically adjusted by certain strategy.
当采用传统的方法对数据仓库进行维护时，所捕获到的变化信息将被直接应用到仓库中相应的表或实视图上。
When the data warehouse is maintained in usual way, change information will be directly applied to the tables and materialized views in the warehouse. In this paper, a Delta table method is proposed.
在数据仓库的实化视图维护处理中，如何有效地处理并发更新是一个重要而又棘手的问题。
During maintaining the materialized view in the data warehouse, how to efficiently handle the concurrent updates is an important and intractable problem.
视图自维护方法通过在数据仓库中复制所有或部分源关系的数据，从而使维护数据仓库实化视图时不需要访问数据源。
The latter is one way to maintain the materialized view at the DW without access to the base relations by replicating all or parts of the base data at the DW.
基于基库的多实化视图维护将基库集作为多个实化视图的辅助视图集保存在集成端。
The radical database collection which are considered as auxiliary views of multiple materialized view are saved on the integration point.
讨论了目前聚集查询处理的两种方法，即实化视图和近似查询，总结了国内外对其研究现状，并对未来的研究方向提出看法。
This paper deals with two ways to manage aggregate queries: materialized view and approximate query, concludes the processing methods of each way and presents future research directions.
讨论了目前聚集查询处理的两种方法，即实化视图和近似查询，总结了国内外对其研究现状，并对未来的研究方向提出看法。
This paper deals with two ways to manage aggregate queries: materialized view and approximate query, concludes the processing methods of each way and presents future research directions.
应用推荐