SQL Server 2012 BI 学习 第一天
了解数据源，数据源视图，多维数据集，维度 数据源：一个数据库或者其它数据链接，SSAS不支持使用模拟功能来处理 OLAP 对象。模拟信息选择使用服务帐户 数据源视图：DSV是元数据的单个统一视图，是关系数据源的抽象，它成为在多维项目中创建的多维数据集和维
了解数据源，数据源视图，多维数据集，维度
数据源：一个数据库或者其它数据链接，SSAS不支持使用模拟功能来处理 OLAP 对象。模拟信息选择“使用服务帐户”
数据源视图：DSV是元数据的单个统一视图，是关系数据源的抽象，它成为在多维项目中创建的多维数据集和维度的基础，控制项目中使用的数据结构，并且独
立于基础数据源工作，可添加命名列（计算/导出列，SQL语句定义）
多维数据集：通常是度量值组表（明细表），又称为事实数据表）包含感兴趣的度量值。对应的主表（或主表的主表）可自动添加为维度
维度：单个维度内部可以有层次结构（国家-省-城市，年-季度-月-日），，维度属性可从自身或其主表的数据源视图添加
维度的一些属性 AttributeHierarchyDisplayFolder：所属的文件夹（辅助描述层次结构，用于客户端） KeyColumns：能够唯一确定该维度属性的列（或组合） NameColumn：该属性绑定的显示列 维度属性关系：刚性(Rigged)-不随时间变化，柔性(Flexible)-随时间变化
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