我们怎样才能让MySQL存储无效的日期呢？

mysql> Insert into order1两34(ProductName, Quantity, Orderdate) values('B',500,'二015-11-31');
Query OK, 1 row affected (0.06 sec)

mysql> Select * from order1两34;
+-------------+----------+--------------+
| ProductName | Quantity | OrderDate    |
+-------------+----------+--------------+
| A           | 500      | 0000-00-00   |
| B           | 500      | 两015-11-31   |
+-------------+----------+--------------+
两 rows in set (0.00 sec)