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:…
The XMLAGG function in PostgreSQL is used to aggregate multiple XML elements into a single XML value. It is often used in combination with other functions like XMLELEMENT to construct XML documents or fragments. XMLAGG takes a set of XML values and concatenates them together. Here’s the basic syntax of the XMLAGG function: XMLAGG(expression ORDER…
The xmlelement function in PostgreSQL is used to create an XML element. It allows you to construct an XML element with a specified name and content, which can include nested elements, attributes, and text values. Below is the basic syntax of the xmlelement function: xmlelement [ ( name [ , xml_attributes [ , content ]…
The xpath function in PostgreSQL is used to extract XML nodes from an XML document that match a specified XPath expression. XPath is a query language for XML documents that allows you to navigate and select elements and attributes within the XML structure. Below is the syntax for the xpath function: xpath(xpath_expression, xml) where xpath_expression…