Mastering Enterprise BI: Extend the Data Source with Named Calculations, Pt. I - Page 5
March 13, 2006
Define a Data Source View
Having defined the Data Source within our Analysis Services Project, our next steps surround the creation of the Data Source View, a procedure that is customary at this stage in most Analysis Services Projects. It is important to realize, as we work with a "live" data connection that we have defined, that we could certainly continue our development efforts with the metadata without an open connection. The Data Source View provides a single, unified view of the metadata from the tables and views that concern us within our project.
NOTE: For more information on Data Source Views, see my article Introduction to MSSQL Server Analysis Services: Introducing Data Source Views at Database Journal.
To define a Data Source View, we will take the following steps:
1. Right-click Data Source Views folder within the Solution Explorer.
2. Select New Data Source View from the context menu that appears, as depicted in Illustration 17.
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The Data Source View Wizard appears, opening with the Welcome to the Data Source View Wizard page, as shown in Illustration 18.
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3. Click Next.
We arrive at the Select a Data Source page, where we see our Adventure Works DW Data Source in the Relational data sources list box on the left side of the page, as depicted in Illustration 19.
Our newly created Data Source is positioned as the default, and will serve us in meeting the objectives of our practice exercise. It is particularly useful to note, as we have mentioned in Introducing Data Source Views, as well as other articles, that we can define a primary data source (a single Data Source like Adventure Works DW is an example), and then add tables and views from secondary data sources.
NOTE: Heterogeneous queries are supported as long as one Data Source is a MSSQL Server Data Source.
4. Click Next.
We arrive at the Select Tables and Views page, where we see the various tables of the Adventure Works DW data source appear in the Available objects list box on the left of the page.
5. Click FactResellerSales in the Available objects list to select it.
6. Click the button marked > to move FactResellerSales to the Included objects list on the right half of the page, as shown in Illustration 20.
7. Click the Add Related Tables button, located underneath the Included objects list.
Several tables appear within the Included objects list, as depicted in Illustration 21.
8. Click Next.
The Completing the Wizard page appears, as shown in Illustration 22.
As indicated in the Completing the Wizard page, our selection includes the following tables:
9. Click Finish to create the new Data Source View, and to dismiss the Data Source View Wizard.
Our new Data Source View, Adventure Works DW, appears in the Data Source Views folder within the Solution Explorer window, as depicted in Illustration 23.
The Data Source View is also presented within the Data Source View Designer, which now opens within Business Intelligence Development Studio, as shown in Illustration 24.
One of several designers within the Studio, the Data Source View Designer for our new Data Source View contains numerous elements that aid us in our organization and design efforts. We can modify the composition of the tables that comprise our view, as well as performing other activities, here. We will get some hands-on exposure to one such activity, working with Named Calculations, within the next section.