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HomeDatabaseMysql TutorialOracle中文乱码解决办法总结

下面总结了大量的关于Oracle中文乱码解决办法,有碰到此类问题的朋友可参考参考。

下面总结了大量的关于Oracle中文乱码解决办法,有碰到此类问题的朋友可参考参考。

AMERICAN_AMERICA.WE8ISO8859P1,这个字符编码是西欧字符编码,对应于.Net的就是iso-8859-1字符编码,所以只需要改到系统的默认字符编码就行了.

解决方法:

(1) 服务器端重新安装ORACLE

  在重新安装ORACLE 时选择与原卸出数据一致的字符集(本例为US7ASCII)。

  加载原卸出的数据。

  这种情况仅仅使用于空库和具有同一种字符集的数据。

(2)

写一个函数:

 代码如下 复制代码

 /**////


        /// 将西欧字符编码转换成GB2312
        ///

        ///
        ///
public static string Convert8859P1ToGB2312(string s)
{
   return System.Text.Encoding.Default.GetString(System.Text.Encoding.GetEncoding("iso-8859-1").GetBytes(s));
 }

(3)强行修改服务器端ORACLE当前字符集

在用imp命令加载数据前,先在客户端用sql*plus登录system DBA用户,执行下列SQL语句进行当前ORACLE数据库字符集修改:

 代码如下 复制代码

SQL > create database character set US7ASCII
  * create database character set US7ASCII
  ERROR at line 1:
  ORA-01031: insufficient privileges


(3)显示中文乱码

在Redhat上安装Oracle 10g没有设定字符集,采用的是操作系统默认字符集:WE8ISO8859P1,将字符集修改为:ZHS16GBK。由于过程不可逆,首先需要备份数据库。
1.数据库全备

 代码如下 复制代码

2.查询当前字符集
SQL> select * from nls_database_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
---------------------------------------- ----------------------------------------
NLS_CHARACTERSET WE8ISO8859P1

3.关闭数据库
SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

4.启动数据库到mount状态

SQL> startup mount
ORACLE instance started.
Total System Global Area 205520896 bytes
Fixed Size 1266608 bytes
Variable Size 100666448 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
Database mounted.

5.限制session

SQL> alter system enable restricted session;
System altered.

6.查询相关参数并修改

SQL> show parameter job_queue_processes;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
job_queue_processes integer 10

SQL> show parameter aq_tm_processes;
NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
aq_tm_processes integer 0

SQL> alter system set job_queue_processes=0;
System altered.

7.打开数据库

SQL> alter database open;
Database altered.

8.修改字符集

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

出现错误提示,新字符集必须是老字符集的超集,也就原来字符集是新字符集的子集,可以再Oracle官方文档上查询字符集包含关系。下面使用Oracle内部命令internal_use,跳过超集检查,生产环境不建议使用此方法。

SQL> alter database character set internal_use ZHS16GBK;
Database altered.

9.查询当前字符集
SQL> select * from nls_database_parameters where parameter='NLS_CHARACTERSET';
PARAMETER VALUE
---------------------------------------- ----------------------------------------
NLS_CHARACTERSET ZHS16GBK

10.关闭数据库

SQL> shutdown immediate
Database closed.
Database dismounted.
ORACLE instance shut down.

11.启动数据库到mount状态

SQL> startup mount
ORACLE instance started.
Total System Global Area 205520896 bytes
Fixed Size 1266608 bytes
Variable Size 100666448 bytes
Database Buffers 100663296 bytes
Redo Buffers 2924544 bytes
Database mounted.

12.将相关参数改回原来值

SQL> alter system set job_queue_processes=10;
System altered.

13.打开数据库

SQL> alter database open;
Database altered.

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