select 

      attribute                  as  attr

   ,    _1_file_ext  
      + _4_file_ext  
      + _13_file_ext 
      + _16_file_ext 
                                 as  square     

   ,    _2_file_ext  
      + _5_file_ext  
      + _11_file_ext 
      + _12_file_ext 
                                 as  triangle
   ,
        _3_file_ext  
      + _6_file_ext  
      + _7_file_ext  
      + _10_file_ext 
                                 as  circle

   ,    _8_file_ext  
      + _9_file_ext  
      + _14_file_ext 
      + _15_file_ext 
                                 as  rectangle  

from public.atts