Reprinted: http://blog.itpub.net/29500582/viewspace-1314555/
Oracle to view the permissions or roles of the currently logged in user
View the roles of the current user
SQL>select * from user_role_privs;
SQL>select * from session_privs
View the system permissions and table-level permissions of the current user
SQL>select * from user_sys_privs;
SQL>select * from user_tab_privs;
Attachment:
1. View users:
1 .View current users:
select * from v$session; 2.View
all users:
select * from dba_users;
select * from all_users;
select * from user_users;2.View
roles: 1.All roles
activated by the current user
select * from session_roles;
2. The roles granted by the current user
select * from user_role_privs;
2. The roles granted by all users
select * from dba_role_privs;
3. View all roles:
select * from dba_roles;
4. Query the roles granted by the current role
Select GRANTED_ROLE from ROLE_ROLE_PRIVS where ROLE=&ROLE;--例如role= 'DBA'
三、查看权限：
1.基本权限查询：
select * from session_privs;--当前用户所拥有的全部权限
select * from user_sys_privs;--当前用户的系统权限
select * from user_tab_privs;--当前用户的表级权限
select * from dba_sys_privs;--查询某个用户所拥有的系统权限
select * from role_sys_privs;--查看角色(只能查看登陆用户拥有的角色)所包含的权限
2.查看用户对象权限：
select * from dba_tab_privs;
select * from all_tab_privs;
select * from user_tab_privs;
3.查看哪些用户有sysdba或sysoper系统权限(查询时需要相应权限)
select * from V$PWFILE_USERS
注意：
1、以下语句可以查看Oracle提供的系统权限
select name from sys.system_privilege_map
2、查看一个用户的所有系统权限(包含角色的系统权限)
Sql代码
select privilege from dba_sys_privs where grantee='DATAUSER'
union
select privilege from dba_sys_privs where grantee in (select granted_role from dba_role_privs where grantee='DATAUSER' );