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An introduction to RDF querying in SPARQL
Zwifi
22.2K views
01
Welcome
02
Initial queries
03
Filters
04
Optionality
05
Negation
06
Alternatives
07
Projection
08
Grouping
09
Modifiers
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Modifiers
Previous:
Grouping
Result set modifiers
Ordering the results
Ordering lexicographically
order_lexic.sparql
matrix.ttl
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PREFIX yaco: <https://www.irit.fr/recherches/MELOD
I/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-synt
ax-ns#>
SELECT ?name
WHERE {
?actor rdf:type yaco:Actor;
rdfs:label ?name;
yaco:birthYear ?year.
} ORDER BY ?name
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@prefix yaco: <https://www.irit.fr/recherches/MELO
DI/ontologies/cinema#> .
Run
Ordering by birth year
order_year.sparql
matrix.ttl
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PREFIX yaco: <https://www.irit.fr/recherches/MELOD
I/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-synt
ax-ns#>
SELECT ?name
WHERE {
?actor rdf:type yaco:Actor;
rdfs:label ?name;
yaco:birthYear ?year.
} ORDER BY DESC(?year)
1
@prefix yaco: <https://www.irit.fr/recherches/MELO
DI/ontologies/cinema#> .
Run
Removing duplicates
Who are the actors who played a role?
distinct_off.sparql
matrix.ttl
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PREFIX yaco: <https://www.irit.fr/recherches/MELOD
I/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-synt
ax-ns#>
SELECT ?name
WHERE {
?actor rdf:type yaco:Actor;
rdfs:label ?name;
yaco:playsRole ?role;
yaco:birthYear ?year.
}
1
@prefix yaco: <https://www.irit.fr/recherches/MELO
DI/ontologies/cinema#> .
Run
Who are the actors who played a role?
distinct_on.sparql
matrix.ttl
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PREFIX yaco: <https://www.irit.fr/recherches/MELOD
I/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-synt
ax-ns#>
SELECT DISTINCT ?name
WHERE {
?actor rdf:type yaco:Actor;
rdfs:label ?name;
yaco:playsRole ?role;
yaco:birthYear ?year.
}
1
@prefix yaco: <https://www.irit.fr/recherches/MELO
DI/ontologies/cinema#> .
Run
6
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