Question

having issue to select value for

create table #XMLTest
    (ItemXML xml)


insert into #XMLTest (ItemXML) values ( 
'<MessageType xmlns="ss"> <Subject>sub</Subject> </MessageType>'
)

WITH XMLNAMESPACES('ss' as x)

SELECT 
   ItemXML.query('(/x:MessageType/Subject)') 
FROM 
   #XMLTest 

drop table #XMLTest

Answer 1

Your subelements are also in the name space

WITH XMLNAMESPACES('ss' as x)
SELECT 
   ItemXML.query('(/x:MessageType/x:Subject)') 
FROM 
   #XMLTest