display all the information of employees whose salary is in the range of 8000 and 12000 and commission is not null or department number does not equal to 40.
return employees ;return salaries of #1 ;return #1 where #2 is at least 8000 ;return #1 where #2 is at most 12000 ;return #1 in  both #3 and  #4 ;return commission of #1 ;return #1 where #6 is null ;return #1 besides  #7 ;return department numbers of #1 ;return #1 where #9 is 40 ;return #1 besides  #10 ;return #8 or  #11 ;return #1 in  both #5 and  #12
['select', 'project', 'comparative', 'comparative', 'intersection', 'project', 'comparative', 'discard', 'project', 'comparative', 'discard', 'union', 'intersection']