1、查看当前用户拥有的角色权限信息
select * from role_sys_privs;
2、查看所有用户:
select * from all_users;
3、查看当前用户的详细信息:
select * from user_users;
4、查看所有角色:
select * from dba_roles;
5、查看当前用户的角色信息:
select * from user_role_privs;
6,,查询数据库上操作的所有命令,,需要有dba权限
select * from v$sqlarea t order by t.FIRST_LOAD_TIME desc