try {
  String query = new String("SELECT  " +
    "FirstName, LastName, Street, City, State, ZipCode, Sales " + 
    "FROM Customers " +
    "WHERE Sales BETWEEN 20000 AND 39999 " );
  DataRequest = Database.createStatement();
  Results = DataRequest.executeQuery (query);
  DisplayResults (Results);
  DataRequest.close();
}