Question

In my database there is table as below

+----+-----------+----------+
| id | fk_id     | duration |
+----+-----------+----------+
|  1 |        23 | 00:00:31 |
|  2 |        23 | 00:00:36 |
|  3 |       677 | 00:00:36 |
|  4 |       678 | 00:00:36 |
+----+-----------+----------+

In the above table the column duration is of data type time .

The following one is the schema of that table

Create Table: CREATE TABLE `durationof` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `fk_id` int(11) NOT NULL,
  `duration` time NOT NULL,
  PRIMARY KEY (`id`))

Here the thing just I want to add all times in a duration column in a query, how can I?

Just like sum function is there any function to add all mysql time vales .

I tried select addtime(diration) from durationof;

But that is not working.

Answer 1

I completely disagree with @Corbin’s original answer. As documented under The TIME Type:

TIME values may range from '-838:59:59' to '838:59:59'. The hours part may be so large because the TIME type can be used not only to represent a time of day (which must be less than 24 hours), but also elapsed time or a time interval between two events (which may be much greater than 24 hours, or even negative).

To take the summation of all such intervals: convert to seconds, take the sum and then convert back again.

SELECT SEC_TO_TIME(SUM(TIME_TO_SEC(duration))) FROM durationof

See it on sqlfiddle.