For those of Maghrebis origin, are more Algerian or Moroccan or Tunisian?
return those of Maghrebis origin ;return #1 that are Algerian ;return #1 that are Moroccan ;return #1 that are Tunisian ;return number of  #2 ;return number of  #3 ;return number of  #4 ;return which is the  highest of #5 ,  #6 ,   #7
['select', 'filter', 'filter', 'filter', 'aggregate', 'aggregate', 'aggregate', 'comparison']