它还可以订阅一个特殊事件，当收到特定通知时采取行动(例如清空一张表)。

It can also subscribe to a particular event, taking action (such as clearing a table) when it receives a specific notification.

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要从通知数据库中删除表。

To delete tables from the notification database.

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Database Interface Designer将创建一个对应于user表的类型树并显示通知消息。

The Database Interface Designer will produce a type tree that corresponds to the USER table, and notification message will be displayed.

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