Some basic concepts of E-R relation model and multi-dimension data model are introduced, and design of multi-dimension data model of demand management is described in detail.
本文介绍了ER关系模型和多维数据模型的一些基本概念，着重介绍了需求管理的多维数据模型设计。
Some basic concepts of E-R relation model and multi-dimension data model are introduced, and design of multi-dimension data model of demand management is described in detail.
本文介绍了ER关系模型和多维数据模型的一些基本概念，着重介绍了需求管理的多维数据模型设计。
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