Name
DB.DBA.SAMPLE — returns an arbitrary value from the multiset passed to it.
Synopsis
DB.DBA.SAMPLE
(
|
in
token
varchar
); |
Description
DB.DBA.SAMPLE is aggregate function that returns an arbitrary value from the multiset passed to it.
Note: Using the "sql:" prefix is mandatory for this aggregate.
Parameters
strg
An item from multiset.
Return Types
any
Examples
Example 24.286.
SQL>SPARQL
SELECT (sql:SAMPLE(?nick)), (sql:SAMPLE(?interest))
WHERE
{
?p a foaf:Person .
?p foaf:nick ?nick.
?p foaf:interest ?interest.
}
callret-0 callret-1
VARCHAR VARCHAR
________________________________________________
dr. Jones http://purl.org/rss/1.0/
No. of rows in result: 1