ORA-31072：Too many child nodes in XMLType fragment for updateXML
错误码
错误描述：Too many child nodes in XMLType fragment for updateXML
错误原因：An attempt was made to pass an XMLType fragment with multiple children as new data for the updateXML operator.
解决方法：Extract the desired child from the XMLType before passing it to updateXML as the desired new XML node.
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