Oracle 内置视图

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 all_sys_privs;

select * from user_sys_privs;

3.查看用户对象权限：

select * from dba_tab_privs;

select * from all_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：

select * from dba_role_privs;

select * from user_role_privs;

6.查看当前用户的缺省表空间

select username,default_tablespace from user_users;

7.查看某个角色的具体权限，如grant connect,resource,create session,create view to TEST;查看RESOURCE具有那些权限，用

SELECT * FROM DBA_SYS_PRIVS WHERE GRANTEE='RESOURCE';

SELECT file_name FROM dba_data_files

union

select file_name from dba_temp_files

union

select member from v$logfile

union

select name from v$controlfile