MySQL错语信息 错误编码：1054 错误信息：Unknown column 'listtime' in 'order clause' 错误语句：SELECT id,company,adpics,logo,service FROM simcms_member WHERE isdealer=2 and ischeck=1 and cid=345 and concat(',',fitupmethod,',') like '%,2,%' and concat(',',service,',') like '%,4,%' ORDER BY listtime desc LIMIT 0,24