|
mysql>
mysql> SELECT 'ABC' REGEXP '^Aa?C';
+----------------------+
| 'ABC' REGEXP '^Aa?C' |
+----------------------+
| 0 |
+----------------------+
1 row in set (0.00 sec)
mysql>
mysql> SELECT 'ABC' REGEXP '^ABa?C';
+-----------------------+
| 'ABC' REGEXP '^ABa?C' |
+-----------------------+
| 1 |
+-----------------------+
1 row in set (0.00 sec)
mysql>
mysql> SELECT 'ABC' REGEXP '^Ba?C';
+----------------------+
| 'ABC' REGEXP '^Ba?C' |
+----------------------+
| 0 |
+----------------------+
1 row in set (0.00 sec)
mysql>
|