TIME_FORMAT( ) understands time-related specifiers in the format string.

     
mysql>
TIME_FORMAT( ) works with TIME, DATETIME, or TIMESTAMP values.
mysql>
mysql> CREATE TABLE datetime_val
    -> (
    ->  dt      DATETIME
    -> );
Query OK, 0 rows affected (0.01 sec)

mysql>
mysql>
mysql> INSERT INTO datetime_val (dt) VALUES('1970-01-01 00:00:00');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO datetime_val (dt) VALUES('1987-03-05 12:30:15');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO datetime_val (dt) VALUES('1999-12-31 09:00:00');
Query OK, 1 row affected (0.00 sec)

mysql> INSERT INTO datetime_val (dt) VALUES('2000-06-04 15:45:30');
Query OK, 1 row affected (0.00 sec)

mysql>
mysql> SELECT * FROM datetime_val;
+---------------------+
| dt                  |
+---------------------+
| 1970-01-01 00:00:00 |
| 1987-03-05 12:30:15 |
| 1999-12-31 09:00:00 |
| 2000-06-04 15:45:30 |
+---------------------+
4 rows in set (0.00 sec)

mysql>
mysql>
mysql> SELECT dt,
    -> TIME_FORMAT(dt, '%r') AS '12-hour time',
    -> TIME_FORMAT(dt, '%T') AS '24-hour time'
    -> FROM datetime_val;
+---------------------+--------------+--------------+
| dt                  | 12-hour time | 24-hour time |
+---------------------+--------------+--------------+
| 1970-01-01 00:00:00 | 12:00:00 AM  | 00:00:00     |
| 1987-03-05 12:30:15 | 12:30:15 PM  | 12:30:15     |
| 1999-12-31 09:00:00 | 09:00:00 AM  | 09:00:00     |
| 2000-06-04 15:45:30 | 03:45:30 PM  | 15:45:30     |
+---------------------+--------------+--------------+
4 rows in set (0.00 sec)

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

Related examples in the same category

1.	TIME_FORMAT( ): Synthesizing Dates or Times Using Formatting Functions
2.	Formatting functions allow you to extract more than one part of a value.

TIME_FORMAT( ) understands time-related specifiers in the format string. : TIME_FORMAT « Date Time « SQL / MySQL

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