Press the buttons in the top right panel from top to bottom.

This step will illustrate the performance characteristics of the DELETE command. First, you'll delete all the data in each of the tables using the DELETE command, then you will graph it to see the differences between the table sizes.

Run delete time test
This first step will run the delete command against each of the five tables.

Graph delete times
The second action will take the delete times from the first step and graph them.

After the first step you should see a list of DELETE commands and the time it took them complete.

After the second step you should see a graph of the times in the lower right panel. Note that the time required for the delete operation increases with the volumn of data.