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- Dimension tables contain information about those measures, such as the product that was sold, the month in which it was sold, and so on. 维度表包含有关这些度量值的信息,如售出产品、售出该产品的月份等。
- The wizard samples records in each column in the tables that are defined as dimension tables, to determine the presence of hierarchical relationships between the columns. 该向导对定义为维度表的表中的各列记录进行采样,以确定列之间是否存在层次结构关系。
- Fact table has four columns, and has relationships to two dimension tables, as shown in the following table. 事实数据表有四列,并且与两个维度表有关系,如下表所示。
- On the Identify Fact and Dimension Tables page, select Time in the Time dimension table list, and then click Next. 在“标识事实数据表和维度表”页的“时间维度表”列表中,选择Time,然后单击“下一步”。
- In a snowflake schema, only primary dimension tables are joined to the fact table. 在雪花型架构中,只有主维度表才与事实数据表联接。
- Between the key attribute and the attribute bound to the foreign key in the secondary table that links the underlying dimension tables. 在键属性与绑定到辅助表中链接基础维度表的外键的属性之间定义。
- Dimensions in Analysis Services contain attributes that correspond to columns in dimension tables. Analysis Services中的维度包含与维度表中的列相对应的属性。
- A relational database structure in which data is maintained in a single fact table at the center of the schema with additional dimension data stored in dimension tables. 数据保存在架构中心的单个事实数据表中而其他维度数据存储在维度表中的一种关系数据库结构。
- On the Identify Fact and Dimension Tables page, you can also specify a time dimension table and then associate time properties with columns in the designated dimension table. 在“标识事实数据表和维度表”页上,还可以指定时间维度表,然后将时间属性与指定维度表中的列相关联。
- Time is sometimes called the fourth dimension. 时间有时被称为第四度空间。
- In other words, a dimension must be based on a single dimension table directly related to a fact table. 也就是说,维度必须基于与事实数据表直接相关的单个维度表。
- The tables are firmly fixed to the floor. 桌子都牢牢地固定在地板上。
- Between the key attribute and each non-key attribute bound to columns in the main dimension table. 在键属性与绑定到主维度表中各列的每个非键属性之间定义。
- For example, the following table defines a dimension table for a time dimension. 例如,下表定义了时间维度的维度表。
- To make a regular hierarchy appear ragged, set a HideMemberIf property of a level to an appropriate value for the underlying dimension table. 若要使规则层次结构变得不规则,请将某个级别的HideMemberIf属性设置为相应的基础维度表值。
- For each dimension, the Schema Generation Wizard generates a dimension table to be included in the subject area database. 对于每个维度,架构生成向导都会生成一个要包含在主题区域数据库中的维度表。
- The fact table for that measure group contains a foreign key column that references members in the dimension table for the Organization dimension. 该度量值组的事实数据表包含一个外键列,该列引用了Organization维度的维度表中的成员。
- The fact table for that measure group contains a foreign key column that references the currency identifiers in the dimension table for that dimension. 该度量值组的事实数据表包含一个外键列,该外键列引用该维度的维度表中的货币标识符。
- For example, you might create five data flows, each copying data from a flat file into a different dimension table in a data warehouse star schema. 例如,可以创建五个数据流,每个数据流都将数据从平面文件复制到数据仓库星形架构中的不同维度表中。
- The wizard generates a relationship between the column for each parent attribute and the primary key of the dimension table. 向导将生成每个父属性的列与维度表的主键之间的关系。