PostgreSQL – XMLCONCAT Function

The xmlconcat function is used to concatenate multiple XML fragments or elements into a single XML document in PostgreSQL database. This function is useful when you want to combine XML data from multiple sources or generate a new XML document by concatenating existing XML elements.

The basic syntax of the xmlconcat function is as follows:

xmlconcat(xml_element1, xml_element2, ..., xml_elementN)

where xml_element1, xml_element2, …, xml_elementN are the XML elements or fragments that you want to concatenate. You can specify multiple XML elements separated by commas.

Below is an example of using the xmlconcat function:

SELECT xmlconcat( '<person><name>John</name><age>30</age></person>', '<person><name>Jane</name><age>28</age></person>' ) AS concatenated_xml;

In this example, we’re using xmlconcat to concatenate two XML fragments representing person information into a single XML document. The result will be a single XML document that combines both person elements:

<person><name>John</name><age>30</age></person> <person><name>Jane</name><age>28</age></person>