當前位置:我的異常網(wǎng)? 數(shù)據(jù)庫???oracle 查看、批改字符集編碼

oracle 查看、批改字符集編碼

www.myexceptions.net??網(wǎng)友分享于：2013-07-19??瀏覽：3次

oracle 查看、修改字符集編碼

oracle 查看、修改字符集編碼

ALTER DATABASE CHARACTER SET ZHS16GBK;

出現(xiàn)了error

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

method ：ALTER DATABASE character set INTERNAL_USE ZHS16GBK;

寫道

SQL> conn /as sysdba

Connected.

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup mount

ORACLE instance started.

Total System Global Area? 236000356 bytes

Fixed Size?????????????????? 451684 bytes

Variable Size???????????? 201326592 bytes

Database Buffers?????????? 33554432 bytes

Redo Buffers???????????????? 667648 bytes

Database mounted.

SQL> ALTER SESSION SET SQL_TRACE=TRUE;//語句跟蹤

System 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

提示我們的字符集：新字符集必須為舊字符集的超集，這時我們可以跳過超集的檢查做更改：

SQL> ALTER DATABASE character set INTERNAL_USE ZHS16GBK;

Database altered.

SQL> select * from v$nls_parameters;

PARAMETER??????????????????????????????????????????????????????? VALUE

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

NLS_LANGUAGE???????????????????????????????????????????????????? AMERICAN

NLS_TERRITORY??????????????????????????????????????????????????? AMERICA

NLS_CURRENCY???????????????????????????????????????????????????? $

NLS_ISO_CURRENCY???????????????????????????????????????????????? AMERICA

NLS_NUMERIC_CHARACTERS?????????????????????????????????????????? .,

NLS_CALENDAR???????????????????????????????????????????????????? GREGORIAN

NLS_DATE_FORMAT????????????????????????????????????????????????? DD-MON-RR

NLS_DATE_LANGUAGE??????????????????????????????????????????????? AMERICAN

NLS_CHARACTERSET???????????????????????????????????????????????? ZHS16GBK

NLS_SORT???????????????????????????????????????????????????????? BINARY

NLS_TIME_FORMAT????????????????????????????????????????????????? HH.MI.SSXFF AM

PARAMETER??????????????????????????????????????????????????????? VALUE

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

NLS_TIMESTAMP_FORMAT???????????????????????????????????????????? DD-MON-RR HH.MI

NLS_TIME_TZ_FORMAT?????????????????????????????????????????????? HH.MI.SSXFF AM

NLS_TIMESTAMP_TZ_FORMAT????????????????????????????????????????? DD-MON-RR HH.MI

NLS_DUAL_CURRENCY??????????????????????????????????????????????? $

NLS_NCHAR_CHARACTERSET?????????????????????????????????????????? UTF8

NLS_COMP???????????????????????????????????????????????????????? BINARY

NLS_LENGTH_SEMANTICS???????????????????????????????????????????? BYTE

NLS_NCHAR_CONV_EXCP????????????????????????????????????????????? FALSE

19 rows selected.

重啟檢查是否更改完成：

SQL> shutdown immediate;

Database closed.

Database dismounted.

ORACLE instance shut down.

SQL> startup

ORACLE instance started.

Total System Global Area? 236000356 bytes

Fixed Size?????????????????? 451684 bytes

Variable Size???????????? 201326592 bytes

Database Buffers?????????? 33554432 bytes

Redo Buffers???????????????? 667648 bytes

Database mounted.

Database opened.

SQL> select * from v$nls_parameters;

PARAMETER??????????????????????????????????????????????????????? VALUE

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

NLS_LANGUAGE???????????????????????????????????????????????????? AMERICAN

NLS_TERRITORY??????????????????????????????????????????????????? AMERICA

NLS_CURRENCY???????????????????????????????????????????????????? $

NLS_ISO_CURRENCY???????????????????????????????????????????????? AMERICA

NLS_NUMERIC_CHARACTERS?????????????????????????????????????????? .,

NLS_CALENDAR???????????????????????????????????????????????????? GREGORIAN

NLS_DATE_FORMAT????????????????????????????????????????????????? DD-MON-RR

NLS_DATE_LANGUAGE??????????????????????????????????????????????? AMERICAN

NLS_CHARACTERSET???????????????????????????????????????????????? ZHS16GBK

NLS_SORT???????????????????????????????????????????????????????? BINARY

NLS_TIME_FORMAT????????????????????????????????????????????????? HH.MI.SSXFF AM

PARAMETER??????????????????????????????????????????????????????? VALUE

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

NLS_TIMESTAMP_FORMAT???????????????????????????????????????????? DD-MON-RR HH.MI

NLS_TIME_TZ_FORMAT?????????????????????????????????????????????? HH.MI.SSXFF AM

NLS_TIMESTAMP_TZ_FORMAT????????????????????????????????????????? DD-MON-RR HH.MI

NLS_DUAL_CURRENCY??????????????????????????????????????????????? $

NLS_NCHAR_CHARACTERSET?????????????????????????????????????????? UTF8

NLS_COMP???????????????????????????????????????????????????????? BINARY

NLS_LENGTH_SEMANTICS???????????????????????????????????????????? BYTE

NLS_NCHAR_CONV_EXCP????????????????????????????????????????????? FALSE

19 rows selected.

其實沒有那么麻煩 ，只有一下幾步：

1、 將數(shù)據(jù)庫至于restricted mode 否則會報下面的錯誤

引用

SQL> ALTER DATABASE character set INTERNAL_USE ZHS16GBK;

ALTER DATABASE character set INTERNAL_USE ZHS16GBK

*

ERROR at line 1:

ORA-12719: operation requires database is in RESTRICTED mode

SQL> alter system enable restricted session;

System altered.

SQL> select status,logins from v$instance;

STATUS???? LOGINS

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

OPEN???? RESTRICTED

可以查看當前數(shù)據(jù)庫存儲什么狀態(tài)

SQL> alter system disable restricted session;

System altered.

重啟數(shù)據(jù)庫就默認恢復為正常狀態(tài),即 allowed。

PS:

引用

RESTRICTED SESSION

The RESTRICTED SESSION clause lets you restrict logon to Oracle Database. You can

use this clause regardless of whether your instance has the database dismounted or mounted, open or closed.

Specify ENABLE to allow only users with RESTRICTED SESSION system privilege to log on to Oracle Database. Existing sessions are not terminated.This clause applies only to the current instance.Therefore, in an Oracle RAC environment, authorized users without the RESTRICTED SESSION system privilege can still access the database by way of other instances. Specify DISABLE to reverse the effect of the ENABLE RESTRICTED SESSION clause, allowing all users with CREATE SESSION system privilege to log on to Oracle Database. This is the default.

2、

SQL> ALTER DATABASE CHARACTER SET ZHS16GBK;

出現(xiàn)了error

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

SQL> alter database character set internal_use zhs16gbk;

Database altered.

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