query-bd3c889607f1710670f1e8c195a01fb2

rq turtle/ttl

Why does the group_concat multiply up results for a few items?

Use at

PREFIX wikibase: <http://wikiba.se/ontology#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX ps: <http://www.wikidata.org/prop/statement/>
PREFIX p: <http://www.wikidata.org/prop/>
PREFIX bd: <http://www.bigdata.com/rdf#>
SELECT ?item ?itemLabel ?itemDescription ?location  ?tripadvisor
  (GROUP_CONCAT(DISTINCT ?propertyCategoryLabel; SEPARATOR = ", ") AS ?categories) WHERE {

  {
    SELECT ?item ?propertyCategoryLabel ?itemLabel ?itemDescription ?location ?tripadvisor WHERE {
      {
        ?item p:P31 ?statement0.
        ?statement0 (ps:P31/(wdt:P279*)) wd:Q1785071.
      }
      UNION
      {
        ?item p:P31 ?statement1.
        ?statement1 (ps:P31/(wdt:P279*)) wd:Q23413.
      }
      UNION
      {
        ?item p:P31 ?statement2.
        ?statement2 (ps:P31/(wdt:P279*)) wd:Q56344492.
      }
      ?item p:P7959 ?statement3.
      ?statement3 (ps:P7959/(wdt:P279*)) wd:Q67479626.

      OPTIONAL { ?item wdt:P31 ?propertyCategory. }
      OPTIONAL { ?item wdt:P3134 ?tripadvisor.}
      OPTIONAL { ?item wdt:P625 ?location.}
      SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE]". }
    }
  }
}

GROUP BY ?item ?itemLabel ?itemDescription ?location ?tripadvisor

Query found at

graph TD classDef projected fill:lightgreen; classDef literal fill:orange; classDef iri fill:yellow; v10("?categories") v1("?item"):::projected v8("?location"):::projected v6("?propertyCategory") v9("?propertyCategoryLabel"):::projected v2("?statement0") v3("?statement1") v4("?statement2") v5("?statement3") v7("?tripadvisor"):::projected a1((" ")) a2((" ")) a3((" ")) a4((" ")) c9(["wd:Q67479626"]):::iri c5(["wd:Q23413"]):::iri c6(["wd:Q56344492"]):::iri c4(["wd:Q1785071"]):::iri c14(["bd:serviceParam"]):::iri c16(["#91;AUTO_LANGUAGE#93;"]):::literal subgraph union0[" Union "] subgraph union0l[" "] style union0l fill:#abf,stroke-dasharray: 3 3; subgraph union1[" Union "] subgraph union1l[" "] style union1l fill:#abf,stroke-dasharray: 3 3; v1 --"p:P31"--> v4 v4 --"p:statement/P31"--> a3 a3 --"p:direct/P279"--> c6 end subgraph union1r[" "] style union1r fill:#abf,stroke-dasharray: 3 3; v1 --"p:P31"--> v3 v3 --"p:statement/P31"--> a2 a2 --"p:direct/P279"--> c5 end union1r <== or ==> union1l end end subgraph union0r[" "] style union0r fill:#abf,stroke-dasharray: 3 3; v1 --"p:P31"--> v2 v2 --"p:statement/P31"--> a1 a1 --"p:direct/P279"--> c4 end union0r <== or ==> union0l end v1 --"p:P7959"--> v5 v5 --"p:statement/P7959"--> a4 a4 --"p:direct/P279"--> c9 subgraph optional0["(optional)"] style optional0 fill:#bbf,stroke-dasharray: 5 5; v1 -."p:direct/P31".-> v6 end subgraph optional1["(optional)"] style optional1 fill:#bbf,stroke-dasharray: 5 5; v1 -."p:direct/P3134".-> v7 end subgraph optional2["(optional)"] style optional2 fill:#bbf,stroke-dasharray: 5 5; v1 -."p:direct/P625".-> v8 end subgraph s1["http://wikiba.se/ontology#label"] style s1 stroke-width:4px; c14 --"wikibase:language"--> c16 end bind1[/"?propertyCategoryLabel"/] v9 --o bind1 bind1 --as--o v10