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Oracle® Database SQL Language Reference
11g Release 2 (11.2)

Part Number E17118-03
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XMLQUERY

Syntax

Description of xmlquery.gif follows
Description of the illustration xmlquery.gif

XML_passing_clause::=

Description of xml_passing_clause.gif follows
Description of the illustration xml_passing_clause.gif

Purpose

XMLQUERY lets you query XML data in SQL statements. It takes an XQuery expression as a string literal, an optional context item, and other bind variables and returns the result of evaluating the XQuery expression using these input values.

See Also:

Oracle XML DB Developer's Guide for more information on this function

Examples

The following statement specifies the warehouse_spec column of the oe.warehouses table in the XML_passing_clause as a context item. The statement returns specific information about the warehouses with area greater than 50K.

SELECT warehouse_name,
EXTRACTVALUE(warehouse_spec, '/Warehouse/Area'),
XMLQuery(
   'for $i in /Warehouse
   where $i/Area > 50000
   return <Details>
             <Docks num="{$i/Docks}"/>
             <Rail>
               {
               if ($i/RailAccess = "Y") then "true" else "false"
               }
             </Rail>
          </Details>' PASSING warehouse_spec RETURNING CONTENT) "Big_warehouses"
   FROM warehouses;

WAREHOUSE_ID Area      Big_warehouses
------------ --------- --------------------------------------------------------
           1     25000
           2     50000
           3     85700 <Details><Docks></Docks><Rail>false</Rail></Details>
           4    103000 <Details><Docks num="3"></Docks><Rail>true</Rail></Details>
 . . .