1、数据仓库的定义
数据仓库(Data Warehouse，DW)是一个面向主题的、集成的、相对稳定的、反映历史变化的数据集合，数据仓库用于支持管理决策。数据仓库是数据分析和数据可视化的基础，通过将来自不同业务系统的数据汇集到一起，数据仓库会按照一定的主题进行编号、归类、分组，方便用户快速定位数据源，为数据分析提供支撑。
2、数据仓库的作用
数据仓库是为企业所有级别的决策制定过程提供所有类型数据支撑的战略集合，数据仓库有以下三个主要特征和作用：数据仓库是对企业数据的汇聚和集成、数据仓库支持多维分析、数据仓库是数据挖掘技术的关键和基础。
英文翻译：
- Definition of data warehouse
A Data Warehouse (DW) is a subject-oriented, integrated, relatively stable collection of data that reflects historical changes and is used to support management decisions. Data warehouse is the basis of data analysis and data visualization. By collecting data from different business systems together, the data warehouse will be numbered, classified, and grouped according to certain topics to facilitate users to quickly locate data sources and provide support for data analysis.
- The role of data warehouse
Data warehouse is a strategic collection that provides all types of data support for the decision-making process at all levels of the enterprise. Data warehouse has the following three main characteristics and functions: Data warehouse is the convergence and integration of enterprise data, data warehouse supports multidimensional analysis, and data warehouse is the key and foundation of data mining technology.
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