在linux安装oracle时没有更改默认的字符集。

不支持中文

SQL> select * from t

2  ;

ID

----------------------------------------------------------------

NAME

--------------------------------------------------------------------------------

1d2a

￡?￡?

1.查看系统字符集

select * from v$nls_parameters

select name,value$ from sys.props$ where name='NLS_CHARACTERSET'

NAME

------------------------------------------------------------

VALUE$

--------------------------------------------------------------------------------

NLS_CHARACTERSET

WE8ISO8859P1

(应该改为ZHS16GBK)

select nls_charset_name(1) from dual;

NLS_CHARSET_NAME

----------------

US7ASCII

2.更改字符集合  (参考了eygle的文章)

(过程不可逆  先备份)

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> STARTUP MOUNT;

ORACLE instance started.

Total System Global Area  285212672 bytes

Fixed Size                  1218992 bytes

Variable Size             104859216 bytes

Database Buffers          176160768 bytes

Redo Buffers                2973696 bytes

Database mounted.

SQL> ALTER SESSION SET SQL_TRACE=TRUE;

Session altered.

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 ZHS16GBK;

ALTER DATABASE CHARACTER SET ZHS16GBK

*

ERROR at line 1:

ORA-12712: new character set must be a superset of old character set

SQL> ALTER DATABASE CHARACTER SET ZHS16GBK;

ALTER DATABASE CHARACTER SET ZHS16GBK

*

ERROR at line 1:

ORA-12712: new character set must be a superset of old character set

SQL> ALTER DATABASE CHARACTER SET UTF8

2  ;

ALTER DATABASE CHARACTER SET UTF8

*

ERROR at line 1:

ORA-12712: new character set must be a superset of old character set

SQL> ALTER DATABASE CHARACTER SET UTF-8

2  ;

ALTER DATABASE CHARACTER SET UTF-8

*

ERROR at line 1:

ORA-00933: SQL command not properly ended

SQL> ALTER DATABASE CHARACTER SET WE8MSWIN1252;

Database altered.

SQL> COMMIT;

Commit complete.

(可以更改 但是还不支持中文)

SQL> SHUTDOWN IMMEDIATE;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup;

ORACLE instance started.

Total System Global Area  285212672 bytes

Fixed Size                  1218992 bytes

Variable Size             104859216 bytes

Database Buffers          176160768 bytes

Redo Buffers                2973696 bytes

Database mounted.

Database opened.

(看来只能重建实例了)