每隔多久就需要更新数据仓库？
BCBST构建了一个数据治理应用程序来平衡和控制数据仓库的更新。
BCBST built a data governance application to balance and control updates to the data warehouse.
此模式描述MDM系统与数据仓库和数据集市之间的集成，这些系统是下游系统而且不向 MDM系统返回更新。
This pattern describes the integration between MDM systems and data warehouses and data marts, where these systems are downstream systems and are not providing updates back to the MDM system.
数据仓库中数据更新的期望频率是多少？
What is the expected frequency of the data updates in the data warehouse?
Facebook正在尝试将HBase用于数据仓库里的持续更新的维数据。
Facebook is testing the use of HBase for continuously updating dimension data in their warehouse.
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.
本文介绍了数据仓库中的维及其相关概念，并分别对维的对象记录和实例结构的更新方法进行了描述和评价。
This paper introduced the conception of dimension in data warehouse. Then the methods of updating object records and instance structure of dimensions are described and evaluated respectively.
首先从理论上总结了数据仓库系统中维度更新的经典策略。
This paper summarizes the classical strategies of dimensions updating in data warehouse system at first.
由于数据源的更新和数据仓库的维护是两个分离的过程，这有可能导致异常数据的出现。
Because the updates of data sources and the maintenance of the warehouse are decoupled, it may incur data anomalies.
数据仓库定期地通过ETL过程(每个晚上或者每周运行)来更新，ETL过程使用大块的数据更新技术。
A data warehouse is updated on a regular basis by the ETL process (run nightly or weekly) using bulk data modification techniques.
它不但可以有效地支持数据仓库上的大数据量批量追加更新，而且具有很高的区域查询性能。
Experimental results show that not only can CMD-Forest support bulk appending efficiently but also provide higher range query performance.
同时对数据源的连接、数据的转换、数据仓库中数据定时更新等问题给出了具体的解决方案。
At the same time, gave readers some important means about data source link, data transformation and data timely update etc.
基于该模型，给出了支持多数据仓库的主动数据更新算法，并证明了算法的正确性和可行性。
Based on this model, an active data refresh algorithm to support multi-data warehouse was given. The model and the algorithm were then evaluated and validated through implementations and analysis.
数据仓库是一个面向主题的、集成的、不可更新的且随时间不断变化的数据集合。
Data Warehouse is a collection of data which is subject-oriented, integrated, time-varying, non-volatile, primarily used in organizational decision making.
第二，数据仓库在导入初始阶段的数据后，在日常运行中，数据仓库内的数据需要定期进行更新。
Secondly, when DW which has loaded initial operational data is in an ordinary day's work, warehouse data must be regularly refreshed.
首先从理论上总结了数据仓库系统中维度更新的经典策略。
The Theory of Urban Regeneration about Regeneration-space, Regeneration-time and Regeneration-degree;
首先从理论上总结了数据仓库系统中维度更新的经典策略。
The Theory of Urban Regeneration about Regeneration-space, Regeneration-time and Regeneration-degree;
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