What is all the information about employees with D or S in their first name, ordered by salary descending?
return employees with D in their first name ;return employees with S in their first name ;return #1 ,  #2 ;return all information about #3 ;return salary of  #3 ;return #4 ordered by #5 descending
['select', 'select', 'union', 'project', 'project', 'sort']