Secure features are features that you can make inaccessible to databases running on a database server. When a feature is secured (made inaccessible), it is unavailable for use by client applications, database-defined stored procedures, triggers, and events. Secure feature settings apply to all databases running on the database server. Secure features are useful when you need to start a database that could contain embedded logic that you are uncertain of, such as a virus, or when you want to lock down the database server in situations where the database server or the database is hosted by a third-party vendor. The -sf database server option allows you to specify which features you want to secure for databases running on the database server.
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