Oracle小命令

1、查看所有用户

select * from all_users; 
select * from dba_users;
select * from user_users;

2、查看SID

select * from v$tablespace;

3、查看所有的表空间

select * from v$tablespace;

4、查看用户所拥有的角色

select * from dba_role_privs;   
select * from user_role_privs; 

5、用户修改密码，Oracle给用户解锁

 ALTER USER "SCOTT" IDENTIFIED BY "*******"   
 ALTER USER "SCOTT" ACCOUNT UNLOCK