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select userenv('language') from dual;
select * from V$NLS_PARAMETERS;
ÔÚWindowsÏÂsqlplusÍêÈ«Õý³££¬¿ÉÊǵ½LinuxÏ£¬sqlplusÖÐÎÄÏÔʾ¾Í³öÎÊÌâÁË£¬×ÜÊÇÏÔʾ“??”£¬Õâ¸öÎÊÌâÓÖÔõô½â¾öÄØ£¿
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ÆäʵºÜ¼òµ¥ÎÒÃÇÖ»ÒªÉèÖÃÍ˳ösqlplus,ÉèÖÃÏàÓ¦µÄ»·¾³±äÁ¿NLS_LANG
export NLS_LANG="SIMPLIFIED CHINESE_CHINA.ZHS16GBK"
ΪÁËÏ´β»±ØÖØÐÂÉèÖã¬ÎÒÃÇ¿ÉÒÔ½«Æä·ÅÔÚ/home/oracle/.bash_profile»ò/etc/profileÖС£ÖØÐ½øÈësqlplus,µ«ÊÇ·¢ÏÖÔ­À´ÔÚsqlplusÖвåÈëµÄÊý¾ÝÖÐÎÄ»¹ÊÇÏÔʾ"??",²»¹ýÄãÖØÐ²åÈëÒ»Ìõ¿´¿´£¬ÊDz»ÊÇ¿ÉÒÔÕý³£ÏÔʾÖÐÎÄÁË¡£
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export NLS_LANG="AMERICAN_AMERICA.UTF8"
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[oracle@testdb2 ~]$ sqlplus /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on ÐÇÆÚÈý 5ÔÂ 20 08:56:15 2009
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
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  285212672 bytes
Fixed Size                  1218968 bytes
Variable Size              79693416 bytes
Database Buffers          197132288 bytes
Redo Buffers                7168000 bytes
Database mounted.
SQL> alter database noarchivelog;
Database altered.
SQL> ALTER SESSION SET SQL_TRACE=TRUE;
Session altered.
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 DATA


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    select to_char(sysdate,'yyyy-mm-dd hh24:mi:ss') from dual;--»ñµÃµ±Ç°ÏµÍ³Ê±¼ ......

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