Once you define and save your query, you can submit your job.
To submit an advanced query, click on the Submit button.
After you submit the query you will be shown a alert with the option Your query is submitted successfully. Do you want to check the query status.. If you select OK you will be taken to the View and Request Download screen and if you select Cancel you will remain in the query screen and you can modify the query or go back and create a new query.
Next: View and Request Download
WITS Online Help
The World Bank, 2010