oracle断开用户连接并且重新创建用户

1、搜索出用户的sid,serial#

select sid,serial# from v$session where username='user_name';

2、断开会话

alter system kill session 'sid,serial'; 

3、删除用户

drop user user_name cascade;

4、创建用户

create user user_name identified by password;

5、赋予基本角色

grant resource,connect to user_name;