Mysql ided将与PK一起运行得更好。如果您希望提供查询示例；我们可以进一步讨论。 ID (int) dt (timestamp) serial_number (char(20)) data1 (double) data2 (double) ... // oth

ided将与PK一起运行得更好。如果您希望提供查询示例；我们可以进一步讨论。

ID (int)
dt (timestamp)
serial_number (char(20))
data1 (double)
data2 (double)
... // other columns

SELECT * FROM device_data WHERE serial_number = 'XXX' AND dt >= '2018-01-01' AND dt <= '2018-01-07';

device_data_<serial_number>
device_data_0012393746
device_data_7891238456

SELECT * FROM device_data_<serial_number> WHERE dt >= '2018-01-01' AND dt <= '2018-01-07';

CREATE TABLE `test_udp_new` (
 `id` int(20) unsigned NOT NULL AUTO_INCREMENT,
 `dt` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
 `device_sn` varchar(20) NOT NULL,
 `gps_date` datetime NOT NULL,
 `lat` decimal(10,5) DEFAULT NULL,
 `lng` decimal(10,5) DEFAULT NULL,
 PRIMARY KEY (`id`),
 KEY `device_sn_2` (`dt`,`device_sn`),
 KEY `dt` (`dt`),
 KEY `data` (`data`) USING BTREE,
 KEY `test_udp_new_device_sn_dt_index` (`device_sn`,`dt`),
 KEY `test_udp_new_device_sn_data_dt_index` (`device_sn`,`data`,`dt`)
) ENGINE=InnoDB AUTO_INCREMENT=44449751 DEFAULT CHARSET=latin1 ROW_FORMAT=DYNAMIC

SELECT  *
    FROM  test_udp_new
    WHERE  device_sn = 'xxx'
      AND  dt >= 'xxx'
      AND  dt <= 'xxx'
    ORDER BY  dt DESC;

INDEX(serial_number, dt)

PRIMARY KEY(serial_number, dt, id),  -- to optimize that query
INDEX(id)  -- to keep AUTO_INCREMENT happy

 PRIMARY KEY (`id`),
 KEY `device_sn_2` (`dt`,`device_sn`),
 KEY `dt` (`dt`),
 KEY `data` (`data`) USING BTREE,
 KEY `test_udp_new_device_sn_dt_index` (`device_sn`,`dt`),
 KEY `test_udp_new_device_sn_data_dt_index` (`device_sn`,`data`,`dt`)

 PRIMARY KEY(`device_sn`,`dt`, id),
 INDEX(id)
 KEY `dt_sn` (`dt`,`device_sn`),
 KEY `data` (`data`) USING BTREE,