Duplication of XML namespaces in SQL

Question

I have the following problem, I need to remove the \"cfdi_\" for \"cfdi:\"

I used the namespaces to solve that but they are duplicated by each node and I can not elimina

Answer 1

From XML prospective second result is self-sufficient XML element, while first result can be only part of other element where namespace for cfdi prefix is defined. So, I guess all works as you defined.

Sub-select

(SELECT Importe, TasaCuota, TipoFactor, Impuesto, Base
                      FROM CDFIDet
                      FOR XML RAW('cfdi:traslado'), TYPE, ROOT('cfdi:traslados'))

produces self-sufficient result as

because you defined ROOT('cfdi:traslados') - you have namespace in it, and nested elements cfdi:traslado are in the same namespace - there is no separate namespace declaration.

Then top select:

 SELECT 
   '' AS importe,
   (SELECT Importe, TasaCuota, TipoFactor, Impuesto, Base
      FROM CDFIDet
           FOR XML RAW('cfdi:traslado'), TYPE, ROOT('cfdi:traslados'))
 FROM CFDIENC
   FOR XML RAW('cfdi:gatito'), TYPE)

defines a root element for cfdi:traslados as cfdi:gatito it has its own namespace declaration for cfdi prefix.

I'm not familiar with sql-server XML, but what will happen if you remove ROOT('cfdi:traslados') from sub-select? Will it remove xmlns:cfdi="uri" from element?