March 2009
Intermediate to advanced
1051 pages
30h 33m
English
book
Professional Microsoft® SQL Server® Analysis Services 2008 with MDX
by Sivakumar Harinath, Matt Carroll, Sethu Meenakshisundaram, Robert Zare, Denny Guang-Yeu Lee
Content preview from Professional Microsoft® SQL Server® Analysis Services 2008 with MDX
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4.4. Multiple Data Sources within a DSV
Data warehouses usually consist of data from several data sources. Some examples of data sources are SQL Server, Oracle, DB2, and Teradata. Traditionally, the OLTP data is transferred from the operational data store to the data warehouse — the staging area that combines data from disparate data sources. This is not only time intensive in terms of design, maintainability, and storage but also in terms of other considerations such as replication of data and ensuring data is in sync with the source. SSAS 2008 helps you avoid this and gives you a better return on your investment.
The DSV Designer provides you with the capability of adding tables from multiple data sources, which you can then use to build your cubes and dimensions. You first need to define the data sources that include the tables that are part of your data warehouse design using the Data Source Wizard. Once this has been accomplished, you create a DSV and include tables from one of the data sources. This data source is called the primary data source and needs to be a SQL Server. You can then add tables in the DSV Designer by right-clicking in the diagram view and choosing Add/Remove Tables. You need to have a data source defined in your Analysis Services project to be able to add tables from it to the DSV. The Add/Remove Tables dialog allows you to choose a data source as shown in Figure 4-25 so that you can add its tables to the DSV. To illustrate the selection of tables from ...
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