To express time values as minutes, hours, or days, perform the appropriate divisions:

      
mysql>
mysql>
mysql> CREATE TABLE time_val
    -> (
    ->  t1      TIME,
    ->  t2      TIME
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql> INSERT INTO time_val (t1,t2) VALUES('15:00:00','15:00:00');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO time_val (t1,t2) VALUES('05:01:30','02:30:20');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO time_val (t1,t2) VALUES('12:30:20','17:30:45');
Query OK, 1 row affected (0.00 sec)

mysql>
mysql> SELECT * FROM time_val;
+----------+----------+
| t1       | t2       |
+----------+----------+
| 15:00:00 | 15:00:00 |
| 05:01:30 | 02:30:20 |
| 12:30:20 | 17:30:45 |
+----------+----------+
3 rows in set (0.00 sec)

mysql>
mysql>
mysql> SELECT t1,
    -> TIME_TO_SEC(t1) AS 'seconds',
    -> TIME_TO_SEC(t1)/60 AS 'minutes',
    -> TIME_TO_SEC(t1)/(60*60) AS 'hours',
    -> TIME_TO_SEC(t1)/(24*60*60) AS 'days'
    -> FROM time_val;
+----------+---------+----------+---------+--------+
| t1       | seconds | minutes  | hours   | days   |
+----------+---------+----------+---------+--------+
| 15:00:00 |   54000 | 900.0000 | 15.0000 | 0.6250 |
| 05:01:30 |   18090 | 301.5000 |  5.0250 | 0.2094 |
| 12:30:20 |   45020 | 750.3333 | 12.5056 | 0.5211 |
+----------+---------+----------+---------+--------+
3 rows in set (0.00 sec)

mysql>
mysql> drop table time_val;
Query OK, 0 rows affected (0.00 sec)

Related examples in the same category

1.	Breaking Down Time Intervals into Components
2.	If you pass TIME_TO_SEC( ) a date-and-time value, it extracts the time part and discards the date.
3.	TIME_TO_SEC( ) converts a TIME value to the equivalent number of seconds
4.	TIME_TO_SEC(): strips off the date part and returns the time part as the corresponding number of seconds:
5.	To compute the total elapsed time, use TIME_TO_SEC( ) to convert the values to seconds before summing them.
6.	Using TIME_TO_SEC( ) to strip off the date part of the t_create values
7.	Transform the time differences into seconds using TIME_TO_SEC, add them, and then convert them back
8.	Forcing MySQL to Treat Strings as Temporal Values

To express time values as minutes, hours, or days, perform the appropriate divisions: : TIME_TO_SEC « Date Time « SQL / MySQL

Related examples in the same category