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The best way to explain XQuery is to say this: XQuery with respect to the relationship between the XML and SQL equivalent with respect to relational database tables.
XQuery is designed to query XML data - not limited to XML documents, XML forms can also include any presentation of data, including databases.
Before you continue to learn, we need to have knowledge of the following basic understanding:
If you want to study these subjects first, please our home page to access these tutorials.
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XQuery is used to find and extract from an XML document elements and attributes of the language.
This is an example of an XQuery to solve practical problems:
"Select all prices from CD collection stored there in an XML document named cd_catalog.xml of less than $ 10 CD recording."
XQuery 1.0 and XPath 2.0 share the same data model and support the same functions and operators. If you have learned XPath, XQuery learning so there is no problem.
You can in our " XPath tutorial Read more about XPath knowledge" on.
XQuery can be used to:
XQuery is compatible with a variety of W3C standards, such as XML, Namespaces, XSLT, XPath and XML Schema.
XQuery 1.0 2007 January 23 was established as a W3C Recommendation.
For more information about the W3C XQuery activities, please read our " W3C tutorial ."