Hey Bob,
does this one do what you're after?
SELECT DISTINCT ?cl (COUNT(DISTINCT ?p) AS ?c)
WHERE {
?s a ?cl .
?s ?p ?o .
}
GROUP BY ?cl
Nicola
Il giorno lun 24 gen 2022 alle ore 23:05 Bob DuCharme <b...@snee.com> ha
scritto:
> Using arq and the data at
> http://www.snee.com/bobdc.blog/files/BeatlesMusicians.ttl, I’m trying to
> write a query that will list the classes used in the data and the number
> of distinct properties used by instances of that class. I’m having a
> hard time and can’t even write a query that lists the number of
> properties used for just one of the classes; the following just shows me
> a series of ones.
>
> SELECT (COUNT(DISTINCT ?p) AS ?pcount)
> WHERE {
> ?s a <http://learningsparql.com/ns/schema/Song> .
> ?s ?p ?o .
> }
> GROUP BY ?p
>
> Any suggestions?
>
> Thanks,
>
> Bob
>
>
