Ignorujete jmenný prostor XML, který je definován v kořenovém prvku:
<xml_objects xmlns="http://www.blank.info/ns/2002/ewobjects">
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K dotazu musíte přidat toto:
;WITH XMLNAMESPACES(DEFAULT 'http://www.blank.info/ns/2002/ewobjects')
SELECT
xmldata.value('(@item_id)', 'NCHAR') AS item_id
FROM
(SELECT CAST(x AS XML)
FROM OPENROWSET(BULK 'C:\xmlfile.xml',
SINGLE_BLOB) AS T(x)) AS T(x)
CROSS APPLY
x.nodes('//xml_objects/item_id') AS X(xmldata);