XQuery TutorialLesson 72Free preview

XQuery Add

This lesson is part of XML · All levels

Summary

XQuery can add data to XML documents through an element constructor and attribute, both direct constructor and computed constructor. In the FLWOR query, the return section is where you write the new structure you want to generate. To modify stored documents, additional standards of the XQuery Update Facility are available with the insert, delete, replace, and rename commands.

Key points

Direct constructor: write XML elements as they are inside return
Computed constructor: element name {expression} and attribute name {expression}
New attributes are created with attribute price {"9.99"}
XQuery Update Facility provides node insert / delete node / replace node / rename
The update needs XQuery engine support, not all machines enable it

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