Mine

" columnise a csv file for display only as may crop wide columns
:let width = 20
:let fill=' ' | while strlen(fill) < width | let fill=fill.fill | endwhile
:%s/\([^;]*\);\=/\=strpart(submatch(1).fill, 0, width)/ge
:%s/\s\+$//ge
" Highlight a particular csv column (put in .vimrc)
function! CSVH(x)
    execute 'match Keyword /^\([^,]*,\)\{'.a:x.'}\zs[^,]*/'
    execute 'normal ^'.a:x.'f,'
endfunction
command! -nargs=1 Csv :call CSVH(<args>)
" call with
:Csv 5                             : highlight fifth column