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 'TIME to seconds',
-> SEC_TO_TIME(TIME_TO_SEC(t1)) AS 'TIME to seconds to TIME'
-> FROM time_val;
+----------+-----------------+-------------------------+
| t1 | TIME to seconds | TIME to seconds to TIME |
+----------+-----------------+-------------------------+
| 15:00:00 | 54000 | 15:00:00 |
| 05:01:30 | 18090 | 05:01:30 |
| 12:30:20 | 45020 | 12:30:20 |
+----------+-----------------+-------------------------+
3 rows in set (0.00 sec)
mysql>
mysql> drop table time_val;
Query OK, 0 rows affected (0.00 sec)