Oracle 乱码

select userenv(‘language‘) from dual;

-修改oracle数据库字符集：（在SQL Plus中）

sql> conn / as sysdba;

sql> shutdown immediate;
database closed.
database dismounted.
oracle instance shut down.

sql> startup mount;
oracle instance started.
total system global area 135337420 bytes
fixed size 452044 bytes
variable size 109051904 bytes
database buffers 25165824 bytes
redo buffers 667648 bytes
database mounted.

sql> alter system enable restricted session;
system altered.

sql> alter system set job_queue_processes=0;
system altered.

sql> alter system set aq_tm_processes=0;
system altered.

sql> alter database open;
database altered.

sql> alter database character set internal_use ZHS16GBK;

sql> shutdown immediate;

sql> startup;