When building an application that automatically installs itself on a customer system, see if the database already exists and drop it before creating a new one.
生成自动将自身安装在客户系统上的应用程序时，请检查数据库是否已经存在，并且在创建新的数据库前将其删除。
When building an application that automatically installs itself on a customer system, see if the database already exists and drop it before creating a new one.
生成自动将自身安装在客户系统上的应用程序时，请检查数据库是否已经存在，并且在创建新的数据库前将其删除。
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