How to update all xml attributes' value in an xml variable using t-sql?

Question

Let\'s have a sample snipet

DECLARE @xml XML = N\'

    
    


    
    

        

Answer 1

You can split the XML to a table variable, replace each node separately and then combine them again.

declare @xml xml = 
'<a abb="122">
  <b></b>
 </a>
 <a abb="344">
  <b></b>
 </a>'

declare @T table (XMLCol xml)
insert into @T
select
  a.query('.')
from @xml.nodes('a') a(a)

update @T set
  XMLCol.modify('replace value of (/a/@abb)[1] with 888')

set @xml = (select XMLCol as [*]
            from @T
            for xml path(''))