数据仓库的数据库——特别是数据集市——与终端用户非常接近，它通常不具有固定的查询。

A data warehouse database — especially a data mart — is very near to the end user, and it usually does not have fixed queries.

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物理数据模型是与数据库系统以及您将使用的数据仓库工具紧密相关的。

The physical data model is tightly related to the database system and data warehouse tools that you will use.

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如果是在数据库中，若用于脱机处理的数据(例如数据仓库)与用于联机处理的数据存储在一起，就会降低系统速度。

In the case of a database, data used for offline processing (such as data warehousing) might slow down the system if stored along with data for online processing.

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