Back
Close

An introduction to RDF querying in SPARQL

Zwifi
2,183 views
01 Welcome
02 Initial queries
03 Filters
04 Optionality
05 Negation
06 Alternatives
07 Projection
08 Grouping
09 Modifiers
Previous: Projection Next: Modifiers

Grouping results

Aggregation

Aggregation and projection
PREFIX yaco: <https://www.irit.fr/recherches/MELODI/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT ?name (COUNT(?role) AS ?nb_roles)
WHERE {
?actor rdf:type yaco:Actor;
rdfs:label ?name;
yaco:playsRole ?role.
} GROUP BY ?actor
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Who is he oldest actor?
PREFIX yaco: <https://www.irit.fr/recherches/MELODI/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT ?name (MIN(?year) as ?minYear)
WHERE {
?actor rdf:type yaco:Actor;
rdfs:label ?name;
yaco:birthYear ?year.
}
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

Group filtering

Who are the actors who played in at least two movies?
PREFIX yaco: <https://www.irit.fr/recherches/MELODI/ontologies/cinema#>
PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
SELECT ?name
WHERE {
?actor rdf:type yaco:Actor;
rdfs:label ?name;
yaco:playsRole ?role.
} GROUP BY ?actor
HAVING (COUNT(?role) > 2)
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
Create your playground on Tech.io
This playground was created on Tech.io, our hands-on, knowledge-sharing platform for developers.
Go to tech.io
Suggested playgrounds

Learning algorithmics with Ada

By
Zwifi
5,559
0

Introduction à l'algorithmique

By
Zwifi
4,216
0

Tutoring

By
Unnamed contributor
2,798
51

Why Learn Python

By
[CG]Maxime
5,412
60
codingame x discord
Join the CodinGame community on Discord to chat about puzzle contributions, challenges, streams, blog articles - all that good stuff!
JOIN US ON DISCORD
Online Participants