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Name

DB.DBA.GROUP_CONCAT — returns an arbitrary value from the multiset passed to it.

Synopsis

DB.DBA.GROUP_CONCAT ( in token varchar ,
in delim varchar );

Description

DB.DBA.GROUP_CONCAT is aggregate function that performs a string concatenation across the values of an expression with a group. The order of the strings is not specified. The separator character used in the concatenation may be given with the scalar argument delimiter.

Note: the "sql:" prefix is mandatory when this aggregate is used in SPARQL queries. In SQL queries the prefix is "DB.DBA".

Parameters

token

An item that should be added to a delimited list.

delim

The delimeter character to be used in the concatenation.

Return Types

any

Examples

Example24.287.Simple Use 

SQL>SPARQL
SELECT ?name, (sql:GROUP_CONCAT(?near, ' , '))
WHERE
  {
    GRAPH ?g
      {
        [] a foaf:Person ;
        foaf:name ?name ;
        foaf:based_near ?near
      }
  }
LIMIT 10

name callret-1
ANY  ANY
________________________________________________
Jonas Smedegaard         nodeID://b6190457 , nodeID://b6190507
Adam Harvey            nodeID://b780751
John Breslin         nodeID://b56694
John Breslin         nodeID://b56694
Chris Bizer            http://sws.geonames.org/2950159/ , http://dbpedia.org/resource/Berlin
Leo Sauermann        nodeID://b53598
Andreas Harth        http://dbpedia.org/resource/Karlsruhe , nodeID://b53559 , nodeID://b53569
Alexandre Passant        http://dbpedia.org/resource/Galway
Leon Lord                http://ods-qa.openlinksw.com/dataspace/person/t1#based_near
Leon Smith         http://ods-qa.openlinksw.com/dataspace/person/t2#based_near
No. of rows in result: 10

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