, URLencode() R.
kdb.url <- "http://m1:5000/q.csv?select from data0 where folio0 = `KF"
kdb.url <- URLencode(kdb.url)
df <- read.csv(kdb.url, header=TRUE)
, . (Mine - .)
>kdb.url
[1] "http://m1:5000/q.csv?select%20from%20data0%20where%20folio0%20=%20%60KF"
R.