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Hosseinronaghi
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USE fawiki_p; WITH RECURSIVE subcategories AS ( -- سطح 1: زیرردههای مستقیم یک رده خاص (برای مثال شهرهای_ایران) SELECT cl_from, cl_to FROM categorylinks WHERE cl_to = 'شهرهای_اکلاهما' AND cl_type = 'subcat' UNION ALL -- بازگشت: تمام زیرردههای داخل زیرردهها SELECT cl.cl_from, cl.cl_to FROM categorylinks cl INNER JOIN subcategories sc ON sc.cl_from = cl.cl_to WHERE cl.cl_type = 'subcat' ) -- نمایش تمام زیرردهها SELECT DISTINCT sc.cl_from, sc.cl_to FROM subcategories sc ORDER BY sc.cl_to;
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