Table of Contents

Bind a Report to a Union-Based Federated Data Source

This topic describes how to create a union-based federated data source that combines two tables from different data sources by appending rows from one table to another.

Create a Report and Data Sources

  1. Create a new blank report.

  2. Add a SQL data source that retrieves data from the Customers table of the Northwind database.

  3. Add a JSON data source that retrieves supplier data from the https://services.odata.org/v4/northwind/northwind.svc/Suppliers location.

Create Data Federation

  1. Invoke the designer menu and click Add Data Source.

  2. Select Data Federation in the invoked Data Source Wizard and click Next.

  3. On the next page, click the + (plus) button and select Union to add a Union query.

  4. In the invoked Query Builder, drag and drop the table from the SQL data source onto the design surface.

  5. Drag and drop the JSON data source onto the design surface.

  6. The query includes only fields that have identical names and types in the original sources. You can specify a different name for a field. Click the field's Alias cell and enter the new field name, if necessary.

    You can select the Union All checkbox in the bottom left to prevent the removal of duplicate entries from the query result.

    Click OK to close the Query Builder window.

  7. Click Finish to complete the Data Source Wizard.

    The Wizard creates a new FederationDataSource that includes similar data from both data sources.

Manage the Federation Data Source

When you create a federated query, its name is set to the name of the first table added to the query. You can rename the query in the Manage Queries dialog. To invoke the dialog, click the Manage Queries button.

The Manage Queries dialog appears.

Click the query name in the list to invoke the text editor and change the name.

The Manage Queries dialog allows you to add, modify, or delete queries.

To add a new query, click the Add query drop-down in the bottom left corner and select the query type: Join, Union, or Transform. The Query Builder is invoked to help you construct a new query.

To edit a query, select the query name in the list and click the Edit button that appears in the selected item. The Query Builder window is invoked to help you edit a query.

To delete a query, select the query name in the list and click the Delete button that appears in the selected item. The query is deleted without confirmation.

Note

Once you rename the query, update the report's Data Member property.

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