Virtuoso SPARQL 1.1. Built-In Functions Usage Examples What? This guide contains Virtuoso SPARQL 1.1. Built-In Functions Usage Examples Usage example queries which you can run against any SPARQL endpoint that supports SPARQL 1.1 and the ability to allow a verified user perform INSERT operations.Why? Using built-In functions provides flexibility to build accurate and complex queries.How? Here are examples showcasing Virtuoso's support for this functionality: Functions on RDF Terms isNumeric: See live results SELECT * WHERE { ?x ?t ?o . FILTER isNumeric(?o) } LIMIT 10 Functions on Strings STRDT: See live results SELECT ?o, STRDT("123", xsd:integer) WHERE { ?x ?t ?o . } LIMIT 10 STRLANG: See live results SELECT ?o, STRLANG("chat", "en") WHERE { ?x ?t ?o . } LIMIT 10 STRLEN: See live results SELECT ?o, STRLEN(?t) WHERE { ?x ?t ?o . } LIMIT 10 SUBSTR: See live results **** SELECT DISTINCT ?name1 WHERE { ?x <http://xmlns.com/foaf/0.1/name> ?name1 . ?x <http://xmlns.com/foaf/0.1/mbox> ?mbox1 . ?y <http://xmlns.com/foaf/0.1/name> ?name2 . ?y <http://xmlns.com/foaf/0.1/mbox> ?mbox2 . FILTER (?mbox1 = ?mbox2 && ?name1 != ?name2) . FILTER( bif:length(str(?name1)) > 2 && SUBSTR(?name1, 1) LIKE "%Kingsley%" ) } LIMIT 10 UCASE: See live results SELECT UCASE(?name1 ) WHERE { ?x <http://xmlns.com/foaf/0.1/name> ?name1 . } LIMIT 10 LCASE: See live results SELECT LCASE(?name1 ) WHERE { ?x <http://xmlns.com/foaf/0.1/name> ?name1 . } LIMIT 10 strStarts: See live results SELECT ?name1 WHERE { ?x <http://xmlns.com/foaf/0.1/name> ?name1 . FILTER ( strStarts(?name1, "Kingsley") ). } LIMIT 10 strEnds: See live results PREFIX foaf: <http://xmlns.com/foaf/0.1/> SELECT distinct ?name1 WHERE { ?x foaf:name ?name1 . ?x foaf:mbox ?mbox1 . FILTER ( strEnds(?name1, "hen") ). } LIMIT 10 encode_for_uri: See live results SELECT encode_for_uri(?name1) as ?name WHERE { ?x <http://xmlns.com/foaf/0.1/name> ?name1 . FILTER ( bif:contains(?name1, "France") ). } LIMIT 10 contains: See live results SELECT * WHERE { ?s ?p ?o . FILTER (if (isliteral(?o), contains(str(?o), "Virtuoso"), false)) } LIMIT 10 concat: See live results SELECT concat (?name1 ,?name2 ) WHERE { ?x <http://xmlns.com/foaf/0.1/name> ?name1 . ?x <http://xmlns.com/foaf/0.1/mbox> ?mbox1 . ?y <http://xmlns.com/foaf/0.1/name> ?name2 . ?y <http://xmlns.com/foaf/0.1/mbox> ?mbox2 . FILTER (?mbox1 = ?mbox2 && ?name1 != ?name2) . FILTER ( contains(?name1, "Dan") ). } LIMIT 10 langMatches: See live results SELECT ?title WHERE { ?x <http://purl.org/dc/elements/1.1/title> ?title . FILTER langMatches( lang(?title), "EN" ) } LIMIT 10 regex: See live results SELECT ?name WHERE { ?x <http://xmlns.com/foaf/0.1/name> ?name . FILTER regex(?name, "^ali", "i") . } LIMIT 10 Functions on Numerics round: See live results SELECT round(?o) WHERE { ?s a ?c . ?s geo:geometry ?geo . ?s ?p ?o . FILTER ( bif:isnumeric(?o) ) } LIMIT 10 abs: See live results SELECT abs (?o) ?geo WHERE { ?s a ?c . ?s geo:geometry ?geo . ?s ?p ?o . FILTER (bif:isnumeric(?o) ) } LIMIT 10 ceil: See live results SELECT ceil (?o) WHERE { ?s a ?c . ?s geo:geometry ?geo . ?s ?p ?o . FILTER (bif:isnumeric(?o) ) } LIMIT 10 floor: See live results SELECT floor(?o) WHERE { ?s a ?c . ?s geo:geometry ?geo . ?s ?p ?o . FILTER (bif:isnumeric(?o) ) } LIMIT 10 rand: See live results SELECT floor(?o) rand () WHERE { ?s a ?c . ?s geo:geometry ?geo . ?s ?p ?o . FILTER (bif:isnumeric(?o) ) } LIMIT 10 Functions on Dates and Times now: See live results SELECT now() WHERE { ?s ?p ?o } LIMIT 1 year: See live results SELECT year("2011-01-10T14:45:13.815-05:00"^^xsd:dateTime) WHERE { ?s ?p ?o } LIMIT 1 month: See live results SELECT month ("2011-01-10T14:45:13.815-05:00"^^xsd:dateTime) WHERE { ?s ?p ?o } LIMIT 1 day: See live results SELECT day("2011-01-10T14:45:13.815-05:00"^^xsd:dateTime) WHERE { ?s ?p ?o } LIMIT 1 hours: See live results SELECT hours("2011-01-10T14:45:13.815-05:00"^^xsd:dateTime) WHERE { ?s ?p ?o } LIMIT 1 minutes: See live results SELECT minutes("2011-01-10T14:45:13.815-05:00"^^xsd:dateTime) WHERE { ?s ?p ?o } LIMIT 1 seconds: See live results SELECT seconds ("2011-01-10T14:45:13.815-05:00"^^xsd:dateTime) WHERE { ?s ?p ?o } LIMIT 1 TIMEZONE: See live results SELECT TIMEZONE ("2011-01-10T14:45:13.815-05:00"^^xsd:dateTime) WHERE { ?s ?p ?o } LIMIT 1 tz: See live results SELECT tz("2011-01-10T14:45:13.815-05:00"^^xsd:dateTime) WHERE { ?s ?p ?o } LIMIT 1 Hash Functions MD5: See live results SELECT MD5 ('test') WHERE { ?s ?p ?o } LIMIT 1 SHA1: See live results SELECT SHA1 ('test') WHERE { ?s ?p ?o } LIMIT 1 SHA256: See live results SELECT SHA256 ('test') WHERE { ?s ?p ?o } LIMIT 1 SHA384: See live results SELECT SHA384('test') WHERE { ?s ?p ?o } LIMIT 1 SHA512: See live results SELECT SHA512('test') WHERE { ?s ?p ?o } LIMIT 1 Related SPARQL 1.1. Functions Definitions SPARQL Protocol (HTTP based Query Service) Virtuoso Tips and Tricks Collection Virtuoso SPARQL 1.1 Usage Examples Collection Virtuoso SPARQL 1.1 Syntax Tutorial Virtuoso Documentation