Essential XQuery String Functions: Mastering Text Manipulation in XML
Learn key string functions in XQuery for efficient XML data processing. This tutorial covers commonly used functions (e.g., `concat()`, `substring()`, `contains()`, `replace()`, `lower-case()`, `upper-case()`), providing practical examples and demonstrating how to manipulate and transform textual data within XML documents.
Essential XQuery String Functions
Introduction to XQuery String Functions
XQuery provides a rich set of built-in functions for manipulating strings. These functions are frequently used for data extraction, transformation, and manipulation within XML documents. They enable you to perform various operations on strings, making it easier to work with textual data stored in XML.
Common XQuery String Functions
Here are some commonly used XQuery string functions:
| Index | Function | Description |
|---|---|---|
| 1 | string-length($arg as xs:string) as xs:integer |
Returns the length of the input string. |
| 2 | concat($arg1 as xs:anyAtomicType?, $arg2 as xs:anyAtomicType?, ...) as xs:string |
Concatenates (joins) one or more strings together. |
| 3 | string-join($sequence as xs:string*, $delimiter as xs:string) as xs:string |
Joins strings in a sequence using a specified delimiter. |
Conclusion
XQuery's string functions are essential for efficient and flexible text manipulation. These functions are used to perform various operations such as calculating string length, concatenating strings, and joining strings in a sequence, making it easier to manage and transform textual data within XML documents.