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Figure 7-19. Edit the Excel services sheet. 7. Now, we ll move on to make this sheet that has been posted to SharePoint available as a drill-through report from SSRS. Open Business Intelligence Development Studio (BIDS), and navigate to the KPI dashboard created in Exercise 4-1. Right-click the Won Deals chart, as depicted in Figure 7-20, and select Chart Area Properties. 8. Select the Action option, and paste the URL for the web view of the cube browser that was copied in step 6 into the Select URL field of the resulting dialog, as depicted in Figure 7-21. Click OK.

As a first step, you need to create a publication on the first node with the New Publication Wizard. The name of the server for the first node is BIOREPL. When creating the publication, you should choose transactional replication. Follow the wizard until you come to the Articles page of the wizard (shown previously in Figure 8-5). Select the articles that you want to publish, and click the Article Properties button. You ll see the Article Properties window shown in Figure 8-36. You should go through each of the articles, ensuring that you do not change the settings for the Destination object name and Destination object owner properties. Also ensure the INSERT, UPDATE, and DELETE delivery format options are set to INSERT, UPDATE, and DELETE stored procedures.

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The information returned to the subscriber isn t much more than something has changed: The subscriber doesn t get notified about what was changed Although the dependency is tied to the rows that are returned from the query, it isn t filtered by the individual columns of the query: If you have a query that returns the first and the last names of a customer, and the addresses of those customers change (but their first or last name doesn t change), this also triggers a query notification..

Figure 2-1. The Publisher-Subscriber metaphor used in replication Replication ensures the consistency and integrity of the databases at different server locations. Data is synchronized initially. For example, the Publisher server propagates the changes or updates to the subscribing servers, albeit with a certain time lag. Any conflicts that arise are resolved either programmatically or by the mechanisms provided by SQL Server. The corollary to this is that changes made by the Subscriber servers can be sent back to the Publisher server or republished to other subscribing servers.

Notifications are returned through a single System.Data.SqlClient.SqlConnection that is established solely for this purpose: This connection isn t engaged in connection pooling. When you want to use query notifications in the middle tier or on a Smart Client, the .NET Framework provides classes with which you can directly interact with the query notifications implementation on the database server. .NET offers two possibilities: SqlDependency: The .NET class System.Data.SqlDependency is a high-level implementation to access the query notifications feature on SQL Server 2008. This class allows you to use a dependency to detect changes on the database server. In most cases, this is the simplest and most effective way to leverage the SQL Server 2008 notifications capability by managed client applications using the .NET Framework data provider for SQL Server. SqlNotificationRequest: The low-level implementation is provided by the System.Data.SqlNotificationRequest class that exposes server-side functionality, enabling you to execute a command with a notification request.

Note The paradigm of bidirectional replication has also been used with transactional replication, in which

data is replicated between tables on two servers. Each server has a copy of the table, and changes made in one table get copied to the other server. Each server acts as both a Publisher and a Subscriber server to the other server. Bidirectional transactional replication is discussed in 9.

9. Publish the report to the report manager, and hover over the Won Deals chart. Click through the Won Deals hyperlink, and the cube browser will open in a new window, as shown in Figure 7-22.

s Note When you use query notifications, you must be sure to enable Service Broker for the database.

These are the different components of replication: Distributor Publisher Subscriber Publication

If you want to use query notifications without paying attention to the underlying Service Broker infrastructure, the SqlDependency .NET class from the namespace System.Data is your choice. The SqlDependency class represents a query notification dependency between an application and an instance of SQL Server 2008. When you use query notifications, SQL Server 2008 provides the queue and the service object, because they are created automatically when you create a new database: [QueryNotificationErrorsQueue] [http://schemas.microsoft.com/SQL/Notifications/QueryNotificationService]

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