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;