无详细内容 无 SELECT createdtime FROM `Z_2015-09-15` WHERE deviceid='460040271516782' limit 1;SELECT createdtime FROM `Z_2015-09-15` WHERE deviceid='460040271516782' order by id DESC limit 1;
SELECT createdtime FROM `Z_2015-09-15` WHERE deviceid='460040271516782' limit 1; SELECT createdtime FROM `Z_2015-09-15` WHERE deviceid='460040271516782' order by id DESC limit 1;
