How do you - get the results of N percentage users?
I know there is a rank function but if am not mistaken you can only derive using exact figures from it, e.g. (if(rank(sum(SALES))<=10) but what I want to know is how can I do so but using percentage? e.g. finding Top 20% performers, Median 30%, BTM 50%?
Please advise. Thanks in advance.