SPARQL Examples: Difference between revisions
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PREFIX ex: <http://example.org/> | PREFIX ex: <http://example.org/> | ||
=== | ===Select all triplets in graph=== | ||
SELECT ?s ?p ?o | SELECT ?s ?p ?o | ||
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?s ?p ?o . | ?s ?p ?o . | ||
} | } | ||
=== | ===Select the interestes of Cade=== | ||
SELECT ?cadeInterest | SELECT ?cadeInterest | ||
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ex:Cade ex:interest ?cadeInterest . | ex:Cade ex:interest ?cadeInterest . | ||
} | } | ||
=== | ===Select the country and city where Emma lives=== | ||
SELECT ?emmaCity ?emmaCountry | SELECT ?emmaCity ?emmaCountry | ||
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?address ex:country ?emmaCountry . | ?address ex:country ?emmaCountry . | ||
} | } | ||
=== | ===Select the people who are over 26 years old=== | ||
SELECT ?person ?age | SELECT ?person ?age | ||
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FILTER(?age > 26) . | FILTER(?age > 26) . | ||
} | } | ||
=== | ===Select people who graduated with Bachelor=== | ||
SELECT ?person ?degree | SELECT ?person ?degree | ||
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} | } | ||
=== | ===Delete cades photography interest=== | ||
DELETE DATA | DELETE DATA | ||
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ex:Cade ex:interest ex:Photography . | ex:Cade ex:interest ex:Photography . | ||
} | } | ||
=== | ===Delete and insert university of valencia=== | ||
DELETE { ?s ?p ex:University_of_Valencia } | DELETE { ?s ?p ex:University_of_Valencia } | ||
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WHERE { ?s ?p ex:University_of_Valencia } | WHERE { ?s ?p ex:University_of_Valencia } | ||
=== | ===Check if the deletion worked=== | ||
SELECT ?s ?o2 | SELECT ?s ?o2 | ||
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} | } | ||
=== | ===Insert Sergio=== | ||
INSERT DATA { | INSERT DATA { | ||
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} | } | ||
=== | ===Describe Sergio=== | ||
DESCRIBE ex:Sergio ?o | DESCRIBE ex:Sergio ?o | ||
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} | } | ||
=== | ===Construct that any city is in the country in an address=== | ||
CONSTRUCT {?city ex:locatedIn ?country} | CONSTRUCT {?city ex:locatedIn ?country} | ||
Revision as of 07:14, 15 February 2022
This page will be updated with SPARQL examples as the course progresses.
SPARQL Examples from Session 3: SPARQL
Prefixes used
The examples below will assume that these are in place (some examples aren't yet visible).
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#> PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> PREFIX owl: <http://www.w3.org/2002/07/owl#> PREFIX dc: <http://purl.org/dc/terms/> PREFIX bibo: <http://purl.org/ontology/bibo/> PREFIX foaf: <http://xmlns.com/foaf/0.1/> PREFIX skos: <http://www.w3.org/2004/02/skos/core#> PREFIX ss: <http://semanticscholar.org/> PREFIX kg: <http://i2s.uib.no/kg4news/> PREFIX sp: <http://i2s.uib.no/kg4news/science-parse/> PREFIX th: <http://i2s.uib.no/kg4news/theme/> PREFIX xml: <http://www.w3.org/XML/1998/namespace> PREFIX ex: <http://example.org/>
Select all triplets in graph
SELECT ?s ?p ?o
WHERE {
?s ?p ?o .
}
Select the interestes of Cade
SELECT ?cadeInterest
WHERE {
ex:Cade ex:interest ?cadeInterest .
}
Select the country and city where Emma lives
SELECT ?emmaCity ?emmaCountry
WHERE {
ex:Emma ex:address ?address .
?address ex:city ?emmaCity .
?address ex:country ?emmaCountry .
}
Select the people who are over 26 years old
SELECT ?person ?age
WHERE {
?person ex:age ?age .
FILTER(?age > 26) .
}
Select people who graduated with Bachelor
SELECT ?person ?degree
WHERE {
?person ex:degree ?degree .
?degree ex:degreeLevel "Bachelor" .
}
Delete cades photography interest
DELETE DATA
{
ex:Cade ex:interest ex:Photography .
}
Delete and insert university of valencia
DELETE { ?s ?p ex:University_of_Valencia }
INSERT { ?s ?p ex:Universidad_de_Valencia }
WHERE { ?s ?p ex:University_of_Valencia }
Check if the deletion worked
SELECT ?s ?o2
WHERE {
?s ex:degree ?o .
?o ex:degreeSource ?o2 .
}
Insert Sergio
INSERT DATA {
ex:Sergio a foaf:Person ;
ex:address [ a ex:Address ;
ex:city ex:Valenciay ;
ex:country ex:Spain ;
ex:postalCode "46021"^^xsd:string ;
ex:state ex:California ;
ex:street "4_Carrer_del_Serpis"^^xsd:string ] ;
ex:degree [ ex:degreeField ex:Computer_science ;
ex:degreeLevel "Master"^^xsd:string ;
ex:degreeSource ex:University_of_Valencia ;
ex:year "2008"^^xsd:gYear ] ;
ex:expertise ex:Big_data,
ex:Semantic_technologies,
ex:Machine_learning;
foaf:name "Sergio_Pastor"^^xsd:string .
}
Describe Sergio
DESCRIBE ex:Sergio ?o
WHERE {
ex:Sergio ?p ?o .
?o ?p2 ?o2 .
}
Construct that any city is in the country in an address
CONSTRUCT {?city ex:locatedIn ?country}
Where {
?s rdf:type ex:Address .
?s ex:city ?city .
?s ex:country ?country.
}