The best XQuery Functions Tutorial In 2024, In this tutorial you can learn XQuery Functions,XQuery built-in functions,Examples of function calls,User-defined functions XQuery,
XQuery 1.0, XPath 2.0 and XSLT 2.0 share the same library.
XQuery contains over 100 built-in functions. These functions can be used for string values, numeric, date and time comparison, node and QName manipulation, sequence manipulation, Boolean values, and so on. You can also define your own functions in XQuery.
XQuery function namespace URI:
http://www.w3.org/2005/02/xpath-functions
The default function namespace prefix is fn :.
Tip: call prefix, such as fn:: function often through fn string (). However, since fn: is the default prefix of the namespace, the function names do not need to use the prefix when called.
You can find the complete "in our XPath tutorial built-in XQuery Functions Reference Manual ."
Function calls can be used with an expression. Consider the following example:
If you can not find the required XQuery function, you can write your own functions.
Or users can define separate database query custom function.