Each time you get profiling results for the executed query, they appear in the tree view as a new node with time and date of query execution. When editing your query,
you want to know whether your changes reduce query execution time or not. Query Profiler can quickly compare the profiling results. Do the following:
Select the nodes of the required query profiling results in the tree view by holding the CTRL key.
Click the Compare Selected Results button on the toolbar or select the corresponding option from the shortcut menu. The compared results
appear in the grid where differences are highlighted.