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A¡¢oracle server ¶Ë ×Ö·û¼¯²éѯ 
select userenv(‘language’) from dual 
ÆäÖÐNLS_CHARACTERSET Ϊserver¶Ë×Ö·û¼¯ 
NLS_LANGUAGE Ϊ server¶Ë×Ö·ûÏÔʾÐÎʽ 
B¡¢²éѯoracle client¶ËµÄ×Ö·û¼¯ 
$echo $NLS_LANG 
Èç¹û·¢ÏÖÄãselect ³öÀ´µÄÊý¾ÝÊÇÂÒÂ룬Çë°Ñclient¶ËµÄ×Ö·û¼¯ÅäÖóÉÓëlinux²Ù×÷ϵͳÏàͬµÄ×Ö·û¼¯¡£Èç¹û»¹ÊÇÓÐÂÒÂ룬ÔòÓпÉÄÜÊÇÊý¾Ý¿âÖеÄÊý¾Ý´æÔÚÎÊÌ⣬»òÕßÊÇoracle·þÎñ¶ËµÄÅäÖôæÔÚÎÊÌâ¡£ 
C¡¢server¶Ë×Ö·û¼¯ÐÞ¸Ä 
***************************************************************** 
*  ¸ü¸Ä×Ö·û¼¯²½Öè·½·¨(WE8ISO8859P1 --> ZHS16GBK)            * 
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SQL> 
½«Êý¾Ý¿âÆô¶¯µ½RESTRICTEDģʽÏÂ×ö×Ö·û¼¯¸ü¸Ä£º 
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 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 
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TEMPFILE 'C:\oracle\product\10.1.0\oradata\orcl\test_temp01.dbf'
SIZE 32M
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NEXT 32M MAXSIZE 2048M
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