oracle查詢某個字段重複數據以及截取字符、查找字符下標

select b.* ,b.rowid from a_a_nm_shop_12 b right join (select shop_url From a_a_nm_shop_12 c Group by shop_url having Count(shop_url) > 1 ) T on b.shop_url = T.shop_url where platform_code ='002' selec

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