Help talk:Category intersection

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Possible setbacks for automated category intersection?

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@Achim55: from several CFD (eg this one), I see your believe in (half-)automated category intersection. But isn't it problem that if I want eg "2007 October files related to Finland", then this external tools have to search through million and million files. It may take long long time?--Estopedist1 (talk) 19:07, 21 November 2021 (UTC)[reply]

@Estopedist1: No. See quarry:query/15679. First query has no result because of the now existing intersecting cats, second has a few hits. Both queries 0.07/0.08 seconds. But you are right, intersecting big categories takes a lot of time. On the other hand the structured data efforts on wikidata will provide means to solve that. --Achim55 (talk) 20:29, 21 November 2021 (UTC)[reply]