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Subject Item: n2:VirtTipsAndTricksSPARQL11Drop
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dcterms:created: 2017-06-13T05:38:32.022552
dcterms:modified: 2017-06-13T05:38:32.022552
rdfs:label: VirtTipsAndTricksSPARQL11Drop
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sioc:content: %META:TOPICPARENT{name="VirtTipsAndTricksSPARQL11FeaturesExamplesCollection"}% ---+Virtuoso SPARQL 1.1. DROP Usage Examples %TOC% ---++What? This guide contains Virtuoso SPARQL 1.1. DROP Usage examples 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? Use to remove a named graph from the RDF Quad Store. ---++How? Here are some examples showcasing Virtuoso's support for this functionality: ---+++DROP Example This example drops named graph identified by the IRI <urn:sparql:tests:drop:data> from the RDF Quad Store. 1 Assume the following Raw Data Representation in Turtle: <verbatim> <#book1> <#price> 41 . <#book2> <#price> 42 . <#book3> <#price> 43 . <#book4> <#price> 44 . </verbatim> 1 Create explicitly a named graph with IRI <urn:sparql:tests:drop:data> : <verbatim> CREATE GRAPH <urn:sparql:tests:drop:data>; </verbatim> 1 Load the sample data: <verbatim> INSERT DATA { GRAPH <urn:sparql:tests:drop:data> { <#book1> <#price> 41 . <#book2> <#price> 42 . <#book3> <#price> 43 . <#book4> <#price> 44 . } } </verbatim> 1 Query graph <urn:sparql:tests:drop:data> data -- should return 4 triples: <verbatim> SELECT * FROM <urn:sparql:tests:drop:data> WHERE { ?s ?p ?o } </verbatim> * [[http://bit.ly/10scyxi][View the SPARQL Query Definition via SPARQL Protocol URL]]; * [[http://bit.ly/X8qXRI][View the SPARQL Query Results via SPARQL Protocol URL]] 1 Drop the named graph identified by the IRI <urn:sparql:tests:drop:data> : <verbatim> DROP GRAPH <urn:sparql:tests:drop:data>; </verbatim> * Note: If the graph is not created explicitly as per above, i.e. the step <code>CREATE GRAPH ..</code> is omitted, in order to drop the graph you need to use <code>SILENT</code> option, which will not signal any errors: <verbatim> DROP SILENT GRAPH <urn:sparql:tests:drop:data>; </verbatim> 1 Query graph <urn:sparql:tests:drop:data> data -- should return no triples: <verbatim> SELECT * FROM <urn:sparql:tests:drop:data> WHERE { ?s ?p ?o } </verbatim> * [[http://bit.ly/10scyxi][View the SPARQL Query Definition via SPARQL Protocol URL]]; * [[http://bit.ly/X8qXRI][View the SPARQL Query Results via SPARQL Protocol URL]] ---++Related * [[http://www.w3.org/TR/2012/PR-sparql11-update-20121108/#drop][SPARQL 1.1 DROP]] * [[VirtTipsAndTricksGuideRenameGraph][Rename RDF Graph Example]] * [[http://www.w3.org/TR/rdf-sparql-protocol/][SPARQL Protocol (HTTP based Query Service)]] * [[VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]] * [[VirtTipsAndTricksSPARQL11FeaturesExamplesCollection][Virtuoso SPARQL 1.1 Usage Examples Collection]] * [[http://virtuoso.openlinksw.com/tutorials/sparql/SPARQL_Tutorials_Part_9/SPARQL_Tutorials_Part_9.html][Virtuoso SPARQL 1.1 Syntax Tutorial]] * [[http://docs.openlinksw.com/virtuoso/rdfsparql.html][Virtuoso Documentation]]
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atom:title: VirtTipsAndTricksSPARQL11Drop
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atom:published: 2017-06-13T05:38:32Z
atom:updated: 2017-06-13T05:38:32Z
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Subject Item: n2:VirtTipsAndTricksGuideSPARQLSingleMultipleExecution
sioc:links_to: n2:VirtTipsAndTricksSPARQL11Drop