SPARQL Query “COUNT” in Virtuoso Jena API - QueryParseException

Question

Same query works in DBpedia Endpoint(http://ko.dbpedia.org/sparql), but not in my Java code. I am just trying to extract the frequency using \"COUNT\" function.

Answer 1

This is illegal SPARQL syntax:

SELECT ... count(distinct ?s) as ?count where

It should be

SELECT ... (count(distinct ?s) as ?count) where

The you will have a problem with ?class in:

SELECT ?class (count(distinct ?s) as ?count) where

because it is not a grouped variable (using count you have a group of everything). Did you mean to have a GROUP BY ?class?