1、查看所有用户:
select * from dba_users;
select * from all_users;
select * from user_users;
2、查看用户系统权限
select * from dba_sys_privs;
select * from user_sys_privs;
3、查看oracle用户对象权限
select * from dba_tab_privs;
select * from user_tab_privs;
4、查看所有角色
select * from dba_roles;
5、查看用户所拥有的角色(角色---权限)
select * from dba_role_privs;
select * from user_role_privs;
6、查看的当前用户的缺省表空间(所有用户---from dba_users)
select username,default_tablespace from user_users;
7、查看resource(一个角色)具有哪些权限
select * from dba_sys_privs where grantee='RESOURCE';
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