You can authenticate both database and nondatabase users for an Oracle database. For
simplicity, the same authentication method is generally used for all database users, but
Oracle Database allows a single database instance to use any or all methods.
请教这里说的nondatabase user 是不是指的采用外部验证的操作系统账户？
即时是这样也要在Oracle中create 这个user，这算是nondatabase users吗？
