Question

在MySQL数据库中，我已将数据插入“叶子”表中：

+--------+---------+---------+-------------------------------+-----
|Id_LEAVE|ID_WORKER|    BEGIN_DATE        | END_DATE              | 
+--------+---------+------------+--------------------+------------+
| 4      |   26    | 2019-03-19 07:00:00  |2019-03-19 15:00:00    |
+--------+---------+---+----------------------+-------------------+ 
| 5      |   25    | 2019-03-20 07:00:00  |2019-03-21 15:00:00    |
+--------+---------+---------+----------------------+-------------+
| 6      |   21    | 2019-03-22 07:00:00  |2020-03-22 15:00:00    |
+--------+---------+---------+----------------------+-------------+

然后，我想显示所有带有计算出的休假时间，但没有TIME_FORMAT和SEC_TO_TIME的休假时间，因为我知道它有一个值限制。当我执行以下代码时：

select
  ID_LEAVE, ID_WORKER, BEGIN_DATE, END_DATE,
  concat_ws(' ',
    concat((sec DIV 60*60), 'h'),
    concat((sec DIV 60) % 60, 'm'),
    concat(sec % 60, 's')
  ) AS 'LEAVE TIME'
from (
select
  SUM(
    to_seconds(
      TIMEDIFF(END_DATE, BEGIN_DATE)
    )
  ) sec,
    ID_LEAVE,
    ID_WORKER,
    BEGIN_DATE,
    END_DATE
from
  leaves group by ID_LEAVE
) s;

然后我显示所有这些，但是在LEAVE TIME列中仅显示空值：

+--------+---------+---------+------------+-----------------------+-----------+
|Id_LEAVE|ID_WORKER|    BEGIN_DATE        | END_DATE              |LEAVE_TIME | 
+--------+---------+------------+--------------------+------------+-----------+
| 4      |   26    | 2019-03-19 07:00:00  |2019-03-19 15:00:00    |           |
+--------+---------+---+----------------------+-------------------+-----------+
| 5      |   25    | 2019-03-20 07:00:00  |2019-03-21 15:00:00    |           |
+--------+---------+---------+----------------------+-------------+-----------+
| 6      |   21    | 2019-03-22 07:00:00  |2020-03-22 15:00:00    |           |
+--------+---------+---------+----------------------+-------------+-----------+

我有一个问题：哪里不显示LEAVE_TIME的值的错误。我应该修复Mysql代码的哪几行？感谢任何帮助。

Answer 1

尝试一下，也许可以帮忙

SELECT *,FROM_UNIXTIME(
    UNIX_TIMESTAMP(
        TIMEDIFF(END_DATE,BEGIN_DATE)
    ),
    '%h Hours,%i Minutes,%s Seconds') 
    as 'LEAVE TIME' 
FROM `leaves`

如何显示计算的休假时间？

1 个答案: