Unknown column 'pic' in 'field list'==>1054==>SELECT * FROM 
		(select tablename,id,title,title2 as txt,pic,addtime from shiliepeixun_list union all
		select tablename,id,dfield1 as title,dfield2 as txt,pic,addtime from zhuanyedb_zy union all
		select tablename,id,title,metadescription as txt,pic,addtime from news_list) alltable
		  where  title like '%房屋安全鉴定%'  order by id desc LIMIT 0, 10