View source for Wikidata:SPARQL query service/Wikidata Query Help

{{Shortcut|Help:SPARQL}}
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<div style="background: #006699; border-radius: .2em; color: #FFFFFF; padding: .4em .8em .5em; text-align: center;"><translate><!--T:1--> Welcome to the Wikidata Query Service help portal</translate></div>

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The place where your questions to the Wikidata Query Service are answered. Questions to Wikidata can be about pieces of knowledge in this world and their relationships. This can be used to use Wikidata as a knowledge base or generate lists for other Wikimedia projects, such as Wikipedia.

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We also have documentation for advanced users that goes beyond the first steps. The Wikidata Query Service provides a SPARQL endpoint including a powerful Web-GUI. SPARQL (pronounced "sparkle") is an RDF query language, that is, a semantic query language for databases. With SPARQL, you can extract any kind of data, with a query composed of logical combinations of triples.</translate>
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First steps</translate></div>
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<div style="margin-bottom: 1em;">'''{{ll|Wikidata:SPARQL query service/A gentle introduction to the Wikidata Query Service|2=<translate><!--T:5--> A gentle introduction to the Wikidata Query Service</translate>}}'''

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This introduction introduces you to the user interface of the Wikidata Query Service. You don't need to learn SPARQL to modify queries and display results. This gentle introduction is a good start if you want to start playing around.</translate></div>

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'''{{ll|Wikidata:SPARQL query service/Query Helper|2=<translate><!--T:30--> Query Helper</translate>}}'''<br />
<translate><!--T:31--> How to use the Query Helper to build or edit a query.</translate>
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'''{{ll|Wikidata:SPARQL query service/Wikidata Query Help/Result Views|2=<translate><!--T:21--> Result Views</translate>}}'''

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A showcase of various possibilities to display Wikidata Query results.
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'''{{ll|Wikidata:SPARQL query service/Wikidata Query Help/SPARQL Editor|2=<translate><!--T:28--> SPARQL Editor</translate>}}'''

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A help page to explain the features of the SPARQL editor.
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<translate><!--T:10--> Access the Query Service</translate></div>
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<div style="margin-bottom: 1em;">'''[//query.wikidata.org/ query.wikidata.org]'''

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The user interface of the Wikidata Query Service.</translate></div>
<div style="margin-bottom: 1em;">'''[[Wikidata:Request a query|<translate><!--T:12--> Request a query</translate>]]'''<br />
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This is a page where Wikidata SPARQL queries can be requested from community members who will write them for you as volunteers.</translate></div>

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'''[[Wikidata:SPARQL query service/Building a query|<translate><!--T:26--> Building a query</translate>]]'''<br />
<translate><!--T:27--> Step-by-step examples.</translate>
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'''[https://spinach.genie.stanford.edu/ Spinach Wikidata bot]'''<br />Tool for creating or adjusting queries using natural language.
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<div style="margin-bottom: 1em;">'''<translate><!--T:35--> Tutorials</translate>'''
* '''[https://wdqs-tutorial.toolforge.org/ <translate><!--T:42--> Wikidata Query Service Tutorial</translate>]''': <translate><!--T:43--> interactive tutorial covering SPARQL and the Wikidata service for beginners</translate>
* {{ll|Wikidata:SPARQL tutorial|2=<translate><!--T:36--> SPARQL Tutorial</translate>}} <translate><!--T:37--> A beginner-friendly course for SPARQL. This tutorial is aimed at those who want to dive in deeper into queries and learn the language needed to write complex queries</translate>
* <translate><!--T:39--> [[<tvar name="1">:File:Querying Wikidata with SPARQL for Absolute Beginners.webm</tvar>|Querying Wikidata with SPARQL for Absolute Beginners]], a detailed video tutorial by Asaf Bartov (in English, 2 hours)</translate>

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<translate><!--T:14--> More experienced</translate></div>
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<div style="margin-bottom: 1em;">'''{{ll|Wikidata:SPARQL query service/queries/examples|2=<translate><!--T:15--> Example queries</translate>}}'''<br />
<translate><!--T:16--> Example queries in SPARQL, for inspiration and as building blocks for your own queries.</translate></div>
<div style="margin-bottom: 1em;">'''[[Wikidata:SPARQL query service/qotw|<translate><!--T:44--> Queries of the week archive</translate>]]'''<br />
<translate><!--T:45--> Queries from Wikidata status update weekly summaries</translate></div>

<div style="margin-bottom: 1em;">'''[[mw:Special:MyLanguage/Wikidata Query Service/User Manual|<translate><!--T:17--> User Manual</translate>]]'''

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The user manual contains technical information on the Wikidata Query Service. This includes instructions on how to access it programmatically via <code>GET</code> or <code>POST</code> requests, or how to download and run the software behind the service yourself.</translate></div>

<div style="margin-bottom: 1em;">'''[[Wikidata:SPARQL query service/queries|<translate><!--T:40--> Queries</translate>]]'''<br />
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Advanced query concepts further explained, such as optionality and alternatives, working with dates, coordinates, qualifiers, references, etc.</translate></div>

<div style="margin-bottom: 1em;">'''[[mw:Wikibase/Indexing/RDF Dump Format|<translate><!--T:19--> RDF Dump Format</translate>]]'''<br />
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Technical documentation on the RDF serialization format for Wikidata. This includes information on how information in Wikidata is expressed in RDF and how it can be queried.</translate></div>
<div style="margin-bottom: 1em;">'''[[Wikidata:SPARQL query service/query optimization|<translate><!--T:32--> Query Optimization</translate>]]'''<br />
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Tips on optimizing Queries for faster execution and avoiding time-out.
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<translate><!--T:25--> Wikidata Query Service:</translate> {{ll|Wikidata:SPARQL query service/suggestions|2=<translate><!--T:22--> Suggestions and reports</translate>}} • {{ll|Wikidata:SPARQL query service/query limits|2=<translate><!--T:23--> Query limits</translate>}} • [[Wikidata:Contact the development team/Query Service and search|<translate><!--T:34--> Contact the development team</translate>]] • [https://phabricator.wikimedia.org/project/profile/891/ Phabricator] • [https://grafana.wikimedia.org/dashboard/db/wikidata-query-service <translate><!--T:24--> Operational information</translate>]
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