现在不需要到同一数据库的两个连接，因此可以使用disconnect；命令关闭当前连接。
You don't need two connections to the same database right now, so you can use the disconnect; command to close the current connection.
当应用程序关闭时，会关闭数据库连接、保存当前状态，等等。
When the application shuts down, it can close database connections, save the current state, and so on.
当应用程序关闭时，会关闭数据库连接、保存当前状态，等等。
When the application shuts down, it can close database connections, save the current state, and so on.
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