To Create a Union Operator

1. Drag a Union operator from the Palette to the Design view.

2. Connect the input of the new Union component to two or more operators that have relation output.

3. Double-click the Union operator.

   The property editor opens. Notice that the component has inherited the schema of its input relations.

4. As needed, configure the following property: Name:

5. (Optional) Click the Documentation tab and supply notes on this component.

6. Click OK.