How to obtain all graphs Example

1. Using SPARQL Query: The most popular way for obtaining all graphs list, presuming every graph contains at least one triple for some rdf:type of some subject, is to execute the following query:
   

   
   SQL> SPARQL
   SELECT DISTINCT ?g 
   WHERE 
     { 
        GRAPH ?g {?s a ?t}
     }
   

   
   
2. Using Virtuoso built-in function:: Another solution is to use the Virtuoso DB.DBA.SPARQL_SELECT_KNOWN_GRAPHS function:
   

   
   SQL> DB.DBA.SPARQL_SELECT_KNOWN_GRAPHS();
   GRAPH_IRI
   VARCHAR
   _______________________________________________________________________________
   
   http://www.openlinksw.com/schemas/virtrdf#
   http://localhost:8890/DAV
   http://localhost:8890/dataspace
   http://localhost:8890/dataspace/inf
   
   4 Rows. -- 14 msec.
   

   
   

Related

• Virtuoso Tips and Tricks Collection
• Virtuoso Documentation