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https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.xml.doc/doc/xqrgetdata.html
db2-fn:sqlquery The db2-fn:sqlquery function takes a string argument that represents a fullselect and returns an XML sequence that is a concatenation of the XML values that are returned by the fullselect. The fullselect must specify a single-column result set, and the column must have a data type of XML. Specifying a fullselect allows you to use the power of SQL to present XML data to XQuery.
https://www.ibm.com/support/knowledgecenter/SSEPGG_9.7.0/com.ibm.db2.luw.xml.doc/doc/xqrcontainer.html
DB2 XQuery regular expression support is based on the XML schema regular expression support as defined in the W3C Recommendation XML Schema Part 2: Datatypes Second Edition with extensions as defined by W3C Recommendation XQuery 1.0 and XPath 2.0 Functions and Operators. Limits DB2 XQuery has size limits and limits for data types.
https://www.oxygenxml.com/IBM_DB2_XML_support.html
The support for IBM DB2 Pure XML database includes: multiple server connections, resource management, XML Schema registration, XQuery and SQL execution, and table data editing. See configuration details.
https://www.redbooks.ibm.com/abstracts/tips0896.html
Introduction In November 2011, support was added for XQuery in IBM® DB2® 10 for z/OS® through APARs PM47617 and PM47618. XQuery extends XPath with new language constructs, adding expressiveness to the IBM pureXML® features of DB2.
https://www.oxygenxml.com/doc/IBM_DB2_XML_support.pdf
XQuery Support DB2 pureXML supports XQuery interrog ations when w orking with the XML content of the XML column types. For example if you lik e to generate a XQuery to measure the emplo yee satisf action le vels regarding the compan y rules, you can open an XQuery editor (Ne w->XQuery), configure the transformation scenario
http://www.redbooks.ibm.com/technotes/tips0896.pdf
XQuery in IBM DB2 10 for z/OS 6 XQuery performance XQuery greatly enhances DB2 support for constructing and manipulating XML, far beyond what was expressible using SQL/XML and XPath. XQuery is allowed everywhere that XPath is allowed, including XMLQUERY, XMLEXISTS, and XMLTABLE, but there are some important considerations for performance
http://www-01.ibm.com/support/docview.wss?uid=swg1PM47618
Enabling APAR for XQuery support. ***** * USERS AFFECTED: All DB2 10 for z/OS users of pureXML. * ***** * PROBLEM DESCRIPTION: This is the enabling APAR for the * * embedded XQuery and the constraint * * repetition regular expression extension * * support.
https://www6.software.ibm.com/dw/education/dm/dm0608cao3/dm0608cao3-pdf.pdf
SQL and XQuery tutorial for IBM DB2, Part 3: SQL ... This tutorial is Part 3 of the SQL & XQuery tutorial for IBM DB2 series. Section 1. Before you start ... This guide is designed to allow participants to learn the SQL language and XQuery. As with any learning, it is important to supplement it …
https://www.progress.com/xquery/xml
XQuery XML data integration for rapid access to critical XML data.
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