mysql > desc emp;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| empno | int(11) | YES | | NULL | |
| ename | varchar(15) | YES | | NULL | |
| dob | date | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
3 rows in set (0.001 sec)
mysql > alter table emp change column empno eno int(11);
Query OK, 0 rows affected (0.007 sec)
Records: 0 Duplicates: 0 Warnings: 0
mysql > desc emp;
+-------+-------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+-------------+------+-----+---------+-------+
| eno | int(11) | YES | | NULL | |
| ename | varchar(15) | YES | | NULL | |
| dob | date | YES | | NULL | |
+-------+-------------+------+-----+---------+-------+
3 rows in set (0.001 sec)
mysql >