vvovas

create procedure p(
	@ids xml
)
begin
	select name 
	from 
		dbo.table 
		inner join @ids.nodes('/items/item') root(items) 
			on id = items.value('(text())[1]', 'int')
end

<items>
	<item>1</item>
	...
	<item>1000</item>
</items>

select
	t.id_article 
from
	t
	inner join (select id_article from t group by id_article  having COUNT(1) = 1) t2
		on t.id_article  = t2.id_article 
where
	ID_USER = 15