Question

我试图使用此查询来获取电影。

PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
SELECT ?movie ?movieTitle ?directorName ?DistributorName ?ArtistName ?Country (CONCAT(STR(MONTH(?ReleaseDate)), 
                 "/", 
                 STR(DAY(?ReleaseDate)), 
                 "/", 
                STR(YEAR(?ReleaseDate))) as ?displayDate)
WHERE{ 

  ?movie rdf:type <http://dbpedia.org/ontology/Film> .
  ?movie foaf:name ?movieTitle .
  ?movie dbpedia2:director ?directorName .
  ?movie dbpedia2:distributor ?DistributorName .
  ?movie dbpedia2:starring ?ArtistName .
  ?movie dbpedia2:country ?Country .
  ?movie <http://dbpedia.org/ontology/releaseDate> ?ReleaseDate  .

  FILTER(!isLiteral(?movieTitle) || langMatches(lang(?movieTitle), "EN"))
  FILTER ((?ReleaseDate >= "2001-01-01"^^xsd:date) && (?ReleaseDate < "2016-01-01"^^xsd:date))

}
ORDER BY DESC(?ReleaseDate)
LIMIT 500 OFFSET 0

但是，结果如下：

movieA - directorA - distributorA - ArtistA - Indonesia - 2012/06/10
movieA - directorA - distributorA - ArtistB - Indonesia - 2012/06/10
movieA - directorA - distributorA - ArtistC - Indonesia - 2012/06/10
movieB - directorD - distributorA - ArtistA - Malaysia - 2013/06/10
movieC - directorA - distributorS - ArtistD - France - 2013/03/10

我希望以这种格式获取数据：

movieA - directorA - distributorA - ArtistA,ArtistB,ArtistC - Indonesia - 2012/06/10
movieB - directorD - distributorA - ArtistA - Malaysia - 2013/06/10
movieC - directorA - distributorS - ArtistD - France - 2013/03/10

Answer 1

您可以使用GroupConcat执行此操作。因此，您可以修改查询以包含（GROUP_CONCAT（？ArtistName; separator =“，”）作为？艺术家）。当我运行查询时，我注意到导演（列出多个导演的电影）等也会发生同样的事情。所以如果你想把每部电影都放在一行，你可能也需要将它们分组。

示例查询。

PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> 
SELECT ?movie ?movieTitle ?directorName ?DistributorName(GROUP_CONCAT(?ArtistName ; separator=",") as ?artists) ?Country (CONCAT(STR(MONTH(?ReleaseDate)), 
                 "/", 
                 STR(DAY(?ReleaseDate)), 
                 "/", 
                STR(YEAR(?ReleaseDate))) as ?displayDate)
WHERE{ 

  ?movie rdf:type <http://dbpedia.org/ontology/Film> .
  ?movie foaf:name ?movieTitle .
  ?movie dbp:director ?directorName .
  ?movie dbp:distributor ?DistributorName .
  ?movie dbp:starring ?ArtistName .
  ?movie dbp:country ?Country .
  ?movie <http://dbpedia.org/ontology/releaseDate> ?ReleaseDate  .

  FILTER(!isLiteral(?movieTitle) || langMatches(lang(?movieTitle), "EN"))
  FILTER ((?ReleaseDate >= "2001-01-01"^^xsd:date) && (?ReleaseDate < "2016-01-01"^^xsd:date))

}
ORDER BY DESC(?ReleaseDate)
LIMIT 500 OFFSET 0

如何从dbpedia获得单个记录查询sparql的电影片名，3个艺术家和1个导演？

1 个答案: