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%META:TOPICPARENT{name="VirtTipsAndTricksSPARQL11FeaturesExamplesCollection"}% ---+ Virtuoso SPARQL 1.1. NOT EXISTS and MINUS ---++What? This guide contains example queries using SPARQL 1.1 <code>NOT EXISTS</code> and <code>MINUS</code>, which you should be able to run against any SPARQL 1.1 endpoint. ---++Why? <code>NOT EXISTS</code> and <code>MINUS</code> offer flexible ways to check for the absence of a given pattern, or to exclude possible solutions from the result set. ---++How? Here are some examples showcasing Virtuoso's support for this functionality: ---+++NOT EXISTS <verbatim> SELECT COUNT(*) WHERE { ?s ?p "Novosibirsk" FILTER NOT EXISTS { ?s ?p "???????????" } } </verbatim> * [[http://bit.ly/WCQsvi][View the SPARQL Query Definition via SPARQL Protocol URL]] * [[http://bit.ly/16GYhmC][View the SPARQL Query Results via SPARQL Protocol URL]] ---+++MINUS <verbatim> SELECT COUNT(*) WHERE { { ?s ?p "Novosibirsk" } MINUS { ?s ?p "???????????" } } </verbatim> * [[http://bit.ly/XZTlID][View the SPARQL Query Definition via SPARQL Protocol URL]] * [[http://bit.ly/ZH6VfM][View the SPARQL Query Results via SPARQL Protocol URL]] ---++Related * [[http://www.w3.org/TR/sparql11-query/#neg-notexists-minus][SPARQL 1.1. -- Relationship and differences between NOT EXISTS and MINUS]] * [[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]]

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