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.
Illustration 17: Initial Step in Creating a New Data Source View
The Data Source View Wizard appears, opening with the Welcome to the Data Source View Wizard page, as shown in Illustration 18.
Illustration 18: The Initial Page of the Data Source View Wizard
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.
Illustration 19: Adventure Works DW Appears in the Relational Data Sources
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 additional data sources. As we have noted in other articles of the Introduction to MSSQL Server Analysis Services series, heterogeneous queries are supported as long as one Data Source is a MSSQL Server Data Source.
4. Click Next.
Analysis Services scans Adventure Works DW schema, and then we arrive at the Select Tables and Views page. Here 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. We will be selecting two fact tables, to allow us to house both sales and "budget" data within our cube.
5. Click FactInternetSales in the Available objects list to select it.
6. Click the button marked ">" to move FactInternetSales to the Included objects list on the right half of the page.
7. Click FactSalesQuota in the Available objects list to select it.
8. Click the button marked ">" to move FactSalesQuota to the Included objects list on the right half of the page.
The added tables appear within the Included objects list of Select Tables and Views page as shown in Illustration 20.
Illustration 20: Table Selections for Inclusion in the Data Source View
9. Click the newly added FactInternetSales table in the Included objects list to select it.
10. Click the Add Related Tables button, located underneath the Included objects list.
11. Click the newly added FactSalesQuota table in the Included objects list to select it.
12. Click the Add Related Tables button, located underneath the Included objects list.
Several related tables appear within the Included objects list, as depicted in Illustration 21.
Illustration 21: Our Tables Selection for the Data Source View
13. Click Next.
The Completing the Wizard page appears, as shown in Illustration 22.
Illustration 22: The Final Page of the Data Source View Wizard
As indicated in the Completing the Wizard page, our selection includes the following tables:
14. 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.
Illustration 23: The New Data Source View in the Solution Explorer
The Data Source View is also presented within the Data Source View Designer, which opens simultaneously with the Data Source View. The contents of the Designer appear within Business Intelligence Development Studio, as shown in Illustration 24.
Illustration 24: The New Data Source View in the Data Source View Designer
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 next create a cube based upon the Data Source and Data Source View we have assembled. As a part of this process, we will get some hands-on exposure to working with Measure Groups.