Whenever you execute a query, or part of a query, SQL Visualizer makes of a copy of the text for later reuse. This can be extremely useful if you accidentally close a query without saving it or need to re-run a query you didn't feel worth saving.

To use the Query History just click the drop down arrow on the Query History toolbar button and select the appropriate text from the summaries provided. The text will be inserted into the current query at the current caret position.