Mysql 时间戳差异，仅获取小时、分钟和秒

所以我每行有两张表，我用它来计算平均时间，单位是分钟

SELECT Sec_to_time (Avg (Timestampdiff (second, `survival`, `lastupdate`)))
FROM   main

但是我想单独获得小时、分钟和秒，这样我就可以在php中回显它们。

您可以使用MySQL函数将从秒到秒时间返回的时间分解为其组件

为避免重复计算，您可以将计算包装起来：

SELECT HOUR(x.timeDiff), MINUTE(x.timeDiff), SECOND(x.timeDiff) 
FROM 
  (
    SELECT Sec_to_time(Avg (Timestampdiff (second, `survival`, `lastupdate`))) as timeDiff
    FROM main
  ) AS x

您可以使用MySQL函数将从秒到秒时间返回的时间分解为其组件

为避免重复计算，您可以将计算包装起来：

SELECT HOUR(x.timeDiff), MINUTE(x.timeDiff), SECOND(x.timeDiff) 
FROM 
  (
    SELECT Sec_to_time(Avg (Timestampdiff (second, `survival`, `lastupdate`))) as timeDiff
    FROM main
  ) AS x

MySql中有hour（）、minute（）和second（）函数

MySql中有hour（）、minute（）和second（）函数

试试：

select concat(HOUR(Sec_to_time(Avg (Timestampdiff (second, login_datetime, logout_datetime)))),
  'hr ',
  MINUTE(Sec_to_time(Avg (Timestampdiff (second, login_datetime, logout_datetime)))),
  'min ',
  SECOND(Sec_to_time(Avg (Timestampdiff (second, login_datetime, logout_datetime)))), 
  'sec ') 
as his_time from table_name; 

尝试：

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谢谢，这很好用。但我该如何回应每一个小时、每一分钟和每一秒呢？谢谢，这很好。但我该如何回应每一小时、每一分钟和每一秒？