question: Find the maximum and minimum sales of the companies that are not in the "Banking" industry.
#1 return companies 
#2 return industries of #1 
#3 return #1 where #2 is Banking 
#4 return #1 besides  #3 
#5 return sales of #4 
#6 return maximum of #5 
#7 return minimum of #5 
#8 return #6 ,  #7