数据仓库包含两个含义：数据仓库数据库(Data Warehouse Database)和数据仓库环境(Data Warehouse Environment)。从业务的角度来讲，则主要是知识和商业决策过程。
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数据仓库环境通常要定期处理大量数据。
There is often a huge amount of data that needs to be processed regularly in a data warehouse environment.
数据量：对于一个数据仓库环境，常常需要对巨量的数据进行常规性的处理。
Data Volume: There is often a huge amount of data that needs to be processed regularly for a data warehouse environment.
例如，在数据仓库环境中，数据中可能只有少数几个地方做了修改。
For example, in a data warehouse environment, there may be few changes in the data.
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