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sql:select a.id,a.content,m.category,m.title,m.addtime,m.tbpic,c.cate_name,c.cate_fold_name,c.cate_parent from qunhu_maintb as m inner join qunhu_article as a on a.id=m.id inner join qunhu_category as c on m.category=c.id where m.category in () order by m.addtime desc,m.id desc limit 0,20