XQuery is to XML what SQL is to database tables.
XQuery is designed to query XML data - not just XML files, but anything that can appear as XML, including databases.
XQuery Example
for $x in doc("books.xml")/bookstore/book
where $x/price>30
order by $x/title
return $x/title
What is XQuery?
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XQuery is About Querying XML
XQuery is a language for finding and extracting elements and attributes from XML documents.
Here is an example of what XQuery could solve:
"Select all CD records with a price less than $10 from the CD collection stored in cd_catalog.xml"
XQuery and XPath
XQuery 1.0 and XPath 2.0 share the same data model and support the same functions and operators. If you have already studied XPath you will have no problems with understanding XQuery.
XQuery - Examples of Use
XQuery can be used to:
- Extract information to use in a Web Service
- Generate summary reports
- Transform XML data to XHTML
- Search Web documents for relevant information
XQuery is a W3C Recommendation
XQuery is compatible with several W3C standards, such as XML, Namespaces, XSLT, XPath, and XML Schema.
XQuery 1.0 became a W3C Recommendation January 23, 2007.