社区管理员向用户和用户组分派角色和权限，来设置对社区不同级别的访问。
Community administrators assign roles and permissions to users and user groups to set different levels of access to the community. This scoping can be utilized to implement asset isolation as follows.
DB 2使用五种不同级别的权限来控制用户对实例或数据库执行管理和维护操作。
DB2 USES five different levels of authority to control how users perform administrative or maintenance operations against an instance or a database. These five levels are.
设计了五种角色身份可登陆系统，不同级别的用户对各功能模块的使用权限不同。
Five user roles that have different authorities in different modules were given in the system.
提出了设计用户权限级别模块的方法来管理数据库的安全性，不仅可以为不同级别的用户规定不同的权限，还可以在整个系统上统一管理用户的权限。
A module of managing users' grants is approach to realize the safety of database. With this method, users' grants can be managed over whole distributed system.
提出了设计用户权限级别模块的方法来管理数据库的安全性，不仅可以为不同级别的用户规定不同的权限，还可以在整个系统上统一管理用户的权限。
A module of managing users' grants is approach to realize the safety of database. With this method, users' grants can be managed over whole distributed system.
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