课程名 班级 姓名 学号 信息管理英语 07信息本(1)班 张瑛 70912030 DATA WAREHOUSE Data warehousing provides architectures and tools for business executives to anize, understand, and use their data to make strategic decisions. A large number anizations have found that data warehouse systems are valuable tools in today'petitive, fast evolving world. In the last several years, many firms have spent millions of dollars in building enterprise-wide data warehouses. Many people feel that petition mounting in every industry, data warehousing is the latest must-have marketing weapon —— a way to keep customers by learning more about their needs. “So", you may ask, full of intrigue, “what exactly is a data warehouse?" Data warehouses have been defined in many ways, making it difficult to formulate a rigorous definition. Loosely speaking, a data warehouse refers to a database that is maintained separately from anization's operational databases. Data warehouse systems allow for the integration of a variety of application systems. They support information processing by providing a solid platform of consolidated, historical data for analysis. According to W. H. Inmon, a leading architect in the construction of data warehouse systems, “a data warehouse is a subject-oriented, integrated, time-variant, and nonvolatile collection of data in support of management's decision making process." This short, prehens
