SQL
x
USE wikidatawiki_p;
select a.ips_item_id, a.ips_site_page from
(select * from wb_items_per_site as a where ips_site_id = "zhwikiquote") a
left join
(select * from wb_items_per_site as a where ips_site_id != "zhwikiquote") b
on a.ips_item_id = b.ips_item_id
WHERE b.ips_item_id IS NULL;
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