MySQL错误信息：sub select detect
错误信息：SELECT COUNT(*) as pcount,add_time FROM ( SELECT distinct ip,date(add_time) as add_time FROM `tongji` ) a group by add_time ORDER BY add_time desc LIMIT 7,sub select detect
回复问答禁止带推广链接、违法词及灌水，违规将封禁账号！！了解合理带链接的方法
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