mysql> SELECT 'Monty!' REGEXP '^o';
+----------------------+
| 'Monty!' REGEXP '^o' |
+----------------------+
| 0 |
+----------------------+
1 row in set (0.00 sec)
mysql> SELECT 'Monty!' REGEXP '^M';
+----------------------+
| 'Monty!' REGEXP '^M' |
+----------------------+
| 1 |
+----------------------+
1 row in set (0.00 sec)
mysql> SELECT 'Monty!' RLIKE '^M';
+---------------------+
| 'Monty!' RLIKE '^M' |
+---------------------+
| 1 |
+---------------------+
1 row in set (0.00 sec)