定义

概念数据模型（Conceptual Data Model，CDM），
From PowerBIDesigner：A conceptual data diagram provides a graphical view of the conceptual structure of an information system, and helps you identify the principal entities to be represented, their attributes, and the relationships between them.

作用

重要意义

基于关系建模的CDM

基于维度建模的CDM

CDM的建模步骤

案例分析