Aggregating, then sorting, big table data?

Hi Folks, I’ve got a big table that pulls a LOT of sales data. I want to show a top 10 sales reps kind of chart. Something like:

Aggregate all sales by rep
Display that in a bar chart from rep with most sales to least sales
Limit it to the top 10 largest aggregate values

But wow, I cannot find a way to do this!

Anyone know of a way?

I DID stumble on this post and wonder if theres something here, but I’m not sure what he means by the Javascript column step or how that is done pracitcally: When to go in for Big Tables? - #2 by Darren_Murphy