Once a query is built, you can execute it in the following ways:

1. Double-click any node in the query tree.
2. Right-click a selected node and choose the "Run Query" option from the menu.

• Internal Node: Running a query on an internal node returns the intermediate result set generated up to that point in the query tree.
• Root Node: To obtain the final result set, execute the query on the root node.

In the example below, the result set is generated by double-clicking the root projection node.

• Use the arrow buttons to navigate through the result set:
  • Forward: Computes and retrieves new tuples.
  • Backward: Retrieves previously stored tuples from an earlier forward navigation.