query-09a00185f3c52242abff392556bd3b71

gruppiert nach zentralem Thema

Use at

https://query.wikidata.org/sparql

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT ?topic ?topicLabel (count(?study) AS ?number)
WHERE {
  ?study wdt:P31 wd:Q30612 .
  ?study wdt:P921 ?topic . 
  SERVICE wikibase:label { bd:serviceParam wikibase:language "de,en" }
} GROUP BY ?topic ?topicLabel
ORDER BY DESC(?number)

Query found at

https://www.wikidata.org/wiki/User:Wiljes/Clinical-Trials

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v4("?number") v2("?study"):::projected v3("?topic"):::projected c5(["bd:serviceParam"]):::iri c7(["de,en"]):::literal c2(["wd:Q30612"]):::iri v2 --"wdt:P31"--> c2 v2 --"wdt:P921"--> v3 subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c5 --"wikibase:language"--> c7 end bind1[/"count(?study)"/] v2 --o bind1 bind1 --as--o v4