Comment by gwu78

"The task is to sum the values for each key and print the key with the largest sum."

What is the smart way to do this in kdb+?

This is my naive, sloppy 15min approach.

Warning: Noob. May offend experienced k programmers.

   k)`t insert+:`k`v!("CI";"\t")0:`:tsvfile
   k)f:{select (*:k),(sum v) from t where k=x}
   k)a:f["A"]
   k)b:f["B"]
   k)c:f["C"]
   k)select k from a,b,c where v=(max v)