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SQL:select a.Nname as name ,a.Nid as nid,a.Ncontent as content,a.Ntime as ntime,b.NCid as ncid,b.NCname as ncname from xkuoo_news as a ,xkuoo_news_category as b where a.NCid = b.NCid and a.NCid= order by a.Nid desc limit 0,10语句执行错误!!