As the primary information entity stored in the data warehouse, the data of Materialized views is extracted, transformed, transmit-ted, or loaded from last or remote sources.
实体化视图作为数据仓库中存储的主要信息实体，是由对上一级或外部数据源进行抽取、转化、传输和上载的数据构成的。
Organizing the multidimensional views properly and selecting a set of views to be materialized is an effective way to improve query performances of data warehouse.
合理地组织数据仓库的多维视图，并将部分视图物化，是提高数据仓库查询性能的一个有效途径。
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.
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。
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