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/* with occur as ( select page_title, length(page_title) - length(replace(page_title, '/', '')) as occurrence from page where page_namespace = 10 ) select occur.page_title, occur.occurrence, subpage.page_title from occur sub join occur sur on substring(occur.page_title, 1, length(subpage.page_title)) = subpage.page_title where subpage.occurrence < occur.occurrence */ select count(*) from page where page_namespace = 10 -- select page_title, base_name, occurrence, min(occurrence) from occur group by base_name having min(occurrence) > 1;
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