查询某个端口再一段时间内的流量值

#查询语句，选取时间段（2021-12-26 23:35:00  - 2021-12-26 23:39:59）
SELECT  date_format(from_unixtime(clock), '%Y-%m-%d %H:%i') as time , itemid, value
FROM  history_uint
WHERE itemid IN (41201,41202, 41187,41188)
AND   clock >= 1640532900 AND clock <= 1640533199
ORDER BY  time

结果按时间求和

SELECT 
    unix_timestamp(time) as time_sec, 
    (SUM(value)/1024/1024/1024) as value,
    'Out端口流量汇总(原始数据)' as metric  
FROM 
(SELECT  date_format(from_unixtime(clock), '%Y-%m-%d %H:%i') as time , value 
FROM  history_uint
WHERE itemid IN (41201,41202, 41187,41188)
AND   clock >= 1640532900 AND clock <= 1640533199
ORDER BY  time) 
AS temp 
GROUP BY time;