Order by timestamp value
mysql>
mysql> CREATE TABLE temporal_val
-> (
-> d DATE,
-> dt DATETIME,
-> t TIME,
-> ts TIMESTAMP
-> );
Query OK, 0 rows affected (0.00 sec)
mysql>
mysql> INSERT INTO temporal_val (d, dt, t, ts)
-> VALUES
-> ('1970-01-01','1884-01-01 12:00:00','13:00:00','1980-01-01 02:00:00'),
-> ('1999-01-01','1860-01-01 12:00:00','19:00:00','2021-01-01 03:00:00'),
-> ('1981-01-01','1871-01-01 12:00:00','03:00:00','1975-01-01 04:00:00'),
-> ('1964-01-01','1899-01-01 12:00:00','01:00:00','1985-01-01 05:00:00')
-> ;
Query OK, 4 rows affected (0.00 sec)
Records: 4 Duplicates: 0 Warnings: 0
mysql>
mysql> SELECT * FROM temporal_val;
+------------+---------------------+----------+---------------------+
| d | dt | t | ts |
+------------+---------------------+----------+---------------------+
| 1970-01-01 | 1884-01-01 12:00:00 | 13:00:00 | 1980-01-01 02:00:00 |
| 1999-01-01 | 1860-01-01 12:00:00 | 19:00:00 | 2021-01-01 03:00:00 |
| 1981-01-01 | 1871-01-01 12:00:00 | 03:00:00 | 1975-01-01 04:00:00 |
| 1964-01-01 | 1899-01-01 12:00:00 | 01:00:00 | 1985-01-01 05:00:00 |
+------------+---------------------+----------+---------------------+
4 rows in set (0.00 sec)
mysql>
mysql> SELECT * FROM temporal_val ORDER BY ts;
+------------+---------------------+----------+---------------------+
| d | dt | t | ts |
+------------+---------------------+----------+---------------------+
| 1981-01-01 | 1871-01-01 12:00:00 | 03:00:00 | 1975-01-01 04:00:00 |
| 1970-01-01 | 1884-01-01 12:00:00 | 13:00:00 | 1980-01-01 02:00:00 |
| 1964-01-01 | 1899-01-01 12:00:00 | 01:00:00 | 1985-01-01 05:00:00 |
| 1999-01-01 | 1860-01-01 12:00:00 | 19:00:00 | 2021-01-01 03:00:00 |
+------------+---------------------+----------+---------------------+
4 rows in set (0.00 sec)
mysql>
mysql> drop table temporal_val;
Query OK, 0 rows affected (0.00 sec)