How many employees have salary between 100000 and 200000?
return employees ;return salary of  #1 ;return #1 where  #2 is higher than 100000 ;return #1 where  #2 is lower than 200000 ;return #1 of  both #3 and #4 ;return the  number of  #5
['select', 'project', 'comparative', 'comparative', 'intersection', 'aggregate']