41、MySQL-修改视图

视图的修改可通过如下两种命令实现

1. CREATE OR REPLACE VIEW 视图名...
2. ALTER VIEW 视图名...

方式一、

mysql> CREATE OR REPLACE VIEW v1

-> AS

-> SELECT * FROM department;

Query OK, 0 rows affected (0.02 sec)

mysql> SELECT * FROM v1;

+----+-----------+

| id | depName |

+----+-----------+

| 1 | 开发部 |

| 3 | 教学部 |

| 2 | 视频部 |

| 4 | 运营部 |

+----+-----------+

方式二、

mysql> ALTER VIEW v2

-> AS

-> SELECT * FROM provinces;

Query OK, 0 rows affected (0.02 sec)

mysql> SELECT * FROM v2;

+----+--------+

| id | pName |

+----+--------+

| 4 | 上海 |

| 3 | 北京 |

| 1 | 山东 |

| 2 | 河北 |

| 5 | 美国 |

+----+--------+