oracle数据库更改字符集为utf-8,亲测有效

>shutdown immediate; (把database停了)

>startup mount; (把database重开)

>alter system enable restricted session;

>alter system set job_queue_processes=0;

>alter system set aq_tm_processes=0;

>alter database open;

>alter database character set utf8;

OR

>alter database character set internal_use utf8;

>shutdown immediate;

>startup; (重开正常oracle)

引用自　　：我老婆是大熊猫

　　url　　:  https://www.cnblogs.com/yph5233/p/8994791.html

创建用户和密码：

sqlplus /nolog; 
conn / as sysdba;
创建新用户：SQL> create user pkr identified by manager; 
赋权限：SQL> grant CREATE SESSION to pkr;