--1.查看所有用户:
select * from dba_users;
select * from all_users;
select * from user_users;
--2.查看用户或角色系统权限(直接赋值给用户或角色的系统权限):
select * from dba_sys_privs;
select * from user_sys_privs;
--3.查看角色(只能查看登陆用户拥有的角色)所包含的权限
sql>select * from role_sys_privs;
--4.查看用户对象权限:
select * from dba_tab_privs;
select * from all_tab_privs;
select * from user_tab_privs;
--5.查看所有角色:
select * from dba_roles;
--6.查看用户或角色所拥有的角色:
select * from dba_role_privs;
select * from user_role_privs;
--7.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)
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');
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