Oracle 字符集常见字符集及解决方案
Oracle 字符集常见字符集及解决方案
优先级别：alter session>环境变量>注册表>参数文件
一.查看字符集：
1.查询服务端字符集：
select userenv('language') from dual
or
select * from nls_database_parameters
2.查询客户端：
select * from nls_instance_parameters
客户端字符集与服务端字符集不一致就会出现乱码等问题
3.会话字符集：
select * from nls_session_parameters
二.修改字符集：
1.修改客户端字符集：（推荐）
打开注册表：cmd-regedit
HKEY_LOCAL_MACHINESOFTWAREORACLEKEY_OraDb10g_home1的NLS_LANG
修改NLS_LANG的值为：
比如服务端是：SIMPLIFIED CHINESE_CHINA.AL32UTF8那么客户端也修改成它即可
如果通过注册表方式还是没有解决问题，去修改环境变量：NLS_LANG
dos命令：set nls_lang=AMERICAN_AMERICA.ZHS16GBK
2.服务器端字符集修改：（慎重）
三.常用字符集：
ZHS16GBK
ZHS16CGB231280
AL32UTF8 9i出现的
语法：国家_时间格式.字符集格式
AMERICAN_AMERICA.ZHS16GBK
SIMPLIFIED CHINESE_CHINA.ZHS16GBK
SIMPLIFIED CHINESE_CHINA.AL32UTF8
四.字符集表：
=================================================
一、查看字符集
C:UsersAdmin>sqlplus/nolog
SQL*Plus: Release 11.2.0.1.0 Production on 星期四 7月 19 15:30:52 2018
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> conn /as sysdba;
已连接。
SQL> select * from v$version;
BANNER
--------------------------------------------------------------------------------
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
PL/SQL Release 11.2.0.1.0 - Production
CORE 11.2.0.1.0 Production
TNS for 32-bit Windows: Version 11.2.0.1.0 - Production
NLSRTL Version 11.2.0.1.0 - Production
SQL> select userenv('language') from dual;
USERENV('LANGUAGE')
----------------------------------------------------
SIMPLIFIED CHINESE_CHINA.ZHS16GBK
SQL> select * from v$nls_parameters;
PARAMETER
----------------------------------------------------------------
VALUE
----------------------------------------------------------------
NLS_LANGUAGE
SIMPLIFIED CHINESE
NLS_TERRITORY
CHINA
NLS_CURRENCY
￥
PARAMETER
----------------------------------------------------------------
VALUE
----------------------------------------------------------------
NLS_ISO_CURRENCY
CHINA
NLS_NUMERIC_CHARACTERS
.,
NLS_CALENDAR
GREGORIAN
PARAMETER
----------------------------------------------------------------
VALUE
----------------------------------------------------------------
NLS_DATE_FORMAT
DD-MON-RR
NLS_DATE_LANGUAGE
SIMPLIFIED CHINESE
NLS_CHARACTERSET
ZHS16GBK
PARAMETER
----------------------------------------------------------------
VALUE
----------------------------------------------------------------
NLS_SORT
BINARY
NLS_TIME_FORMAT
HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT
DD-MON-RR HH.MI.SSXFF AM
PARAMETER
----------------------------------------------------------------
VALUE
----------------------------------------------------------------
NLS_TIME_TZ_FORMAT
HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT
DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY
￥
PARAMETER
----------------------------------------------------------------
VALUE
----------------------------------------------------------------
NLS_NCHAR_CHARACTERSET
AL16UTF16
NLS_COMP
BINARY
NLS_LENGTH_SEMANTICS
BYTE
PARAMETER
----------------------------------------------------------------
VALUE
----------------------------------------------------------------
NLS_NCHAR_CONV_EXCP
FALSE
已选择19行。
SQL> select * from nls_database_parameters;
PARAMETER
------------------------------
VALUE
--------------------------------------------------------------------------------
NLS_LANGUAGE
AMERICAN
NLS_TERRITORY
AMERICA
NLS_CURRENCY
$
PARAMETER
------------------------------
VALUE
--------------------------------------------------------------------------------
NLS_ISO_CURRENCY
AMERICA
NLS_NUMERIC_CHARACTERS
.,
NLS_CHARACTERSET
ZHS16GBK
PARAMETER
------------------------------
VALUE
--------------------------------------------------------------------------------
NLS_CALENDAR
GREGORIAN
NLS_DATE_FORMAT
DD-MON-RR
NLS_DATE_LANGUAGE
AMERICAN
PARAMETER
------------------------------
VALUE
--------------------------------------------------------------------------------
NLS_SORT
BINARY
NLS_TIME_FORMAT
HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT
DD-MON-RR HH.MI.SSXFF AM
PARAMETER
------------------------------
VALUE
--------------------------------------------------------------------------------
NLS_TIME_TZ_FORMAT
HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT
DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY
$
PARAMETER
------------------------------
VALUE
--------------------------------------------------------------------------------
NLS_COMP
BINARY
NLS_LENGTH_SEMANTICS
BYTE
NLS_NCHAR_CONV_EXCP
FALSE
PARAMETER
------------------------------
VALUE
--------------------------------------------------------------------------------
NLS_NCHAR_CHARACTERSET
AL16UTF16
NLS_RDBMS_VERSION
11.2.0.1.0
已选择20行。