ALLOW_INVALID_DATES SQL模式的用途是什么？
顾名思义，启用ALLOW_INVALID_DATESSQL模式将使我们能够在表中存储无效日期。下面给出的例子来理解它-
示例
mysql> SET sql_mode = ALLOW_INVALID_DATES;
mysql> Insert Into detail_bday(Name, Birth_Date) values('Sonia','1993-11-31');
mysql> Insert Into detail_bday(Name, Birth_Date) values('Ram','0000-00-00');
mysql> Select * from detail_bday;
+----+---------+------------+
| Sr | Name | Birth_Date |
+----+---------+------------+
| 1 | Saurabh | 1990-05-12 |
| 2 | Raman | 1993-06-11 |
| 3 | Gaurav | 1984-01-17 |
| 4 | Rahul | 1993-06-11 |
| 5 | Sonia | 1993-11-31 |
| 6 | Ram | 0000-00-00 |
+----+---------+------------+
6 rows in set (0.00 sec)上面的结果集显示，在启用ALOOW_INVALID_DATESSQL模式后，MySQL允许我们存储无效的日期，例如“1993-11-31”和“0000-00-00”。