解决PLSQL查不到带中文条件的记录

 

设置环境变量 重启PLSQL

NLS_LANG=AMERICAN_AMERICA.AL32UTF8

 

 

原因:

客户端与服务器端编码不一致

 

了解下NLS_LANG的知识

NLS_LANG 参数组成
NLS_LANG=<Language>_<Territory>.<Clients Characterset> 

 

 

查看oracle服务端编码：select * from sys.nls_database_parameters;

查看client编码：select * from sys.nls_session_parameters;

 

 

 

从下面服务端 编码我们可以得到: NLS_LANG = AMERICAN_AMERICA.AL32UTF8

 

查看oracle服务端编码：select * from sys.nls_database_parameters;

NLS_LANGUAGE  AMERICAN
NLS_TERRITORY  AMERICA
NLS_CURRENCY  $
NLS_ISO_CURRENCY  AMERICA
NLS_NUMERIC_CHARACTERS  .,
NLS_CHARACTERSET  AL32UTF8
NLS_CALENDAR  GREGORIAN
NLS_DATE_FORMAT  DD-MON-RR
NLS_DATE_LANGUAGE  AMERICAN
NLS_SORT  BINARY
NLS_TIME_FORMAT  HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT  DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT  HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT  DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY  $
NLS_COMP  BINARY
NLS_LENGTH_SEMANTICS  BYTE
NLS_NCHAR_CONV_EXCP  FALSE
NLS_NCHAR_CHARACTERSET AL16UTF16
NLS_RDBMS_VERSION 11.2.0.1.0

查看client编码   ：select * from sys.nls_session_parameters;
NLS_LANGUAGE SIMPLIFIED CHINESE
NLS_TERRITORY CHINA
NLS_CURRENCY ￥
NLS_ISO_CURRENCY CHINA
NLS_NUMERIC_CHARACTERS .,
NLS_CALENDAR GREGORIAN
NLS_DATE_FORMAT DD-MON-RR
NLS_DATE_LANGUAGE SIMPLIFIED CHINESE
NLS_SORT BINARY
NLS_TIME_FORMAT HH.MI.SSXFF AM
NLS_TIMESTAMP_FORMAT DD-MON-RR HH.MI.SSXFF AM
NLS_TIME_TZ_FORMAT HH.MI.SSXFF AM TZR
NLS_TIMESTAMP_TZ_FORMAT DD-MON-RR HH.MI.SSXFF AM TZR
NLS_DUAL_CURRENCY ￥
NLS_COMP BINARY
NLS_LENGTH_SEMANTICS BYTE
NLS_NCHAR_CONV_EXCP FALSE

明显客户端的编码和服务器端 的不一致!!!!解决办法:

 

设置环境变量 重启PLSQL

NLS_LANG=AMERICAN_AMERICA.AL32UTF8

 

此方法也适合用exp imp !以免中文有乱码出现!或部分数据乱码!

WINNT>   set NLS_LANG=AMERICAN_AMERICA.AL32UTF8
LINUX>    export NLS_LANG=AMERICAN_AMERICA.AL32UTF8

 

 

查看 NLS_LANG 的方法
Windows使用:echo %NLS_LANG%

C:\Users\Administrator>echo %NLS_LANG%
AMERICAN_AMERICA.AL32UTF8

 

 

修改db编码的办法：（在oracle 11g上通过测试） --风险操作....最好不要用!!!!!!!!
SQL> conn system as sysdba;
SQL> shutdown immediate;
SQL> startup mount;
SQL> alter system enable restricted session;
SQL> alter system set job_queue_processes=0;
SQL> alter database open;
SQL> alter database character set internal_use AL32UTF8;
SQL> shutdown immediate;
SQL> startup 

 

 

另外如果PLSQL查看结果乱码 可能是字体的问题 :请见

http://blog.csdn.net/qq378527566/article/details/7816768