A query expressed by typing English, French or any other spoken language in a normal manner. For example, "how many sales reps sold more than a million dollars in any eastern state in January?" In order to allow for spoken queries, both a voice recognition system and natural language query software are required.
A Natural Language Example
EasyAsk's English Wizard generated the SQL code in the window at the bottom from the English sentence at the top. It is amazing how much SQL is necessary to ask what looks like a simple question. (Screen shot courtesy of EasyAsk Inc.)