I have a Spark DataFrame like this: +-------+------+-----+---------------+ |Account|nature|value| time| +-------+------+-----+---------------+ |
tfs-aggregator
jqbargraph
gitosis
interceptor
time-frequency
event-stream-processing
ccitt
mosix
allocation
mod-deflate
exadata
jsr310
istream
container-storage-interface
slug
jitsi
mockhttpmessagehandler
jarjar
sharpdx
constant-expression
kendo-listview
rcp
angular-ngmodel
extjs4.2
mysql-error-1242
tasker
swrl
context-lookup
jbossfuse
qtreewidgetitem