1.更改数据库字符集为GBK

SHUTDOWN IMMEDIATE;

STARTUP MOUNT EXCLUSIVE;

ALTER SYSTEM ENABLE RESTRICTED SESSION;

ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;

ALTER SYSTEM SET AQ_TM_PROCESSES=0;

ALTER DATABASE OPEN;

ALTER DATABASE NATIONAL CHARACTER SET AL16UTF16; 更改国际字符集

ALTER DATABASE CHARACTER SET ZHS16GBK; 更改本地字符集

SHUTDOWN IMMEDIATE;

STARTUP ;

-- ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE UTF8;

-- alter database character set internal_use ZHS16GBK ;

-- ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE ZHS16GBK;

2.如果错误信息，请对照一下信息

如果提示：

ORA-12717: Cannot issue ALTER DATABASE NATIONAL CHARACTER SET when NCLOB, NCHAR

or NVARCHAR2 data exists

则更改使用以下语句:

ALTER DATABASE NATIONAL CHARACTER SET INTERNAL_USE AL16UTF16;

如果提示：

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

则更改使用以下语句:

ALTER DATABASE character set INTERNAL_USE ZHS16GBK;

如果提示：

ORA-12721: operation cannot execute when other sessions are active

则更改使用以下语句:

SHUTDOWN IMMEDIATE;

STARTUP MOUNT EXCLUSIVE;

如果提示：

ORA-01109: database not open

则更改使用以下语句:

ALTER DATABASE OPEN;

如果提示：

ORA-12719: operation requires database is in RESTRICTED mode

则更改使用以下语句:

ALTER SYSTEM ENABLE RESTRICTED SESSION;

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更改字符集