query-896f5ca095e0056404356af7f0cd21ca

rq turtle/ttl

Grouping by only one variableIs there any way / workaround to group a sparql query by only one variable from the SELECT statement? I have the following query and want to group it by ?player only:

Use at

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 ?number ?playerLabel ?birthday ?nationalityLabel
WHERE 
{
  wd:Q21011427 wdt:P527 ?player .
  OPTIONAL { ?player wdt:P569 ?birthday }.
  OPTIONAL { ?player wdt:P27 ?nationality }.
  OPTIONAL { ?player wdt:P1618 ?number }

  SERVICE wikibase:label {
    bd:serviceParam wikibase:language "de" .
  }
}

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v2("?birthday"):::projected v3("?nationality") v4("?number"):::projected v1("?player") c9(["de"]):::literal c7(["bd:serviceParam"]):::iri c1(["wd:Q21011427"]):::iri c1 --"wdt:P527"--> v1 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v1 -."wdt:P569".-> v2 end subgraph optional1["(optional)"] style optional1 fill:#bbf,stroke-dasharray: 5 5; v1 -."wdt:P27".-> v3 end subgraph optional2["(optional)"] style optional2 fill:#bbf,stroke-dasharray: 5 5; v1 -."wdt:P1618".-> v4 end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c7 --"wikibase:language"--> c9 end