CREATE TABLE IF NOT EXISTS `history_hourly_${timeUnits}` ( `mac` VARCHAR (20) DEFAULT NULL COMMENT '设备mac', `time` datetime DEFAULT NULL COMMENT '数据时间', `value` json DEFAULT NULL COMMENT '数据', KEY `idx_mac_time` (`mac`,`time`) ) ENGINE=INNODB DEFAULT CHARSET=utf8 COMMENT '小时数据表' INSERT INTO history_hourly VALUES (#{item.mac}, #{item.time}, #{item.value}, #{item.version}) SELECT COUNT(1) FROM history_hourly_${timeUnits} WHERE `time` = #{time} AND mac = #{mac} SELECT mac, `value` FROM history_hourly_${timeUnits} WHERE `time` =]]> #{start} AND `time` #{end}