How to remove column name when selecting from a XMLTYPE column using FOR XML PATH

I have a table with a XMLTYPE column named 'InvoiceXML'.

The data in this column is XML in the form:

<Invoice CustomerNum="1234" >
<CustomDeliveryDetails />
</Invoice>

When I do a

SELECT ... FOR XML PATH开发者_C百科(''), ROOT('Invoices') 

I end up with:

<Invoices>
 <InvoiceXML>
  <Invoice CustomerNum="1234" >
  <CustomDeliveryDetails />
  </Invoice>
 </InvoiceXML>
</Invoices>

How do I stop the column name InvoiceXML appearing in the output?

declare @T table (invoiceXML xml)

insert into @T values (
  '<Invoice CustomerNum="1234" >
     <CustomDeliveryDetails />
   </Invoice>
  ')

insert into @T values (
  '<Invoice CustomerNum="4321" >
     <CustomDeliveryDetails />
   </Invoice>
  ')

select (select T.invoiceXML)
from @T as T
for xml path(''), root('Invoices')

Edit 1 The subquery (select T.invoiceXML) has no column name so it is removed.

Try:

SELECT cast(cast(InvoiceXML as nvarchar(max)) + '' as XML)
FROM whatever
FOR XML PATH(''), ROOT('Invoices')

Try this:

SELECT InvoiceXML.query('//Invoice')
  FROM <YOUR_TABLE>
FOR XML PATH('')