DB 2udb定义了一个权限级别层次结构，用于将一组预先确定的管理权限授予用户帐号组。
DB2 UDB defines a hierarchy of authority levels to assign a set of pre-determined administrative rights to groups of user accounts.
DB 2udb定义了一个权限级别层次结构，用于将一组预先确定的管理权限授予用户帐号组。
DB2 UDB defines a hierarchy of authority levels to assign a set of pre-determined administrative rights to groups of user accounts.
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