oracle更新xml节点问题的一些细节

update table1 e set e.xxx_xml=updatexml(e.xxx_xml,'/data/contact/email/text()','value')where 1=1;

update table1 e set e.xxx_xml=updatexml(e.xxx_xml,'/data/contact/email','<email>'|| 'value' || '<email/>')where 1=1;