Oracle编码设置

查看和修改oracle数据库字符集

select  userenv( 'language' )  from  dual;
--查询结果：
SIMPLIFIED CHINESE_CHINA.AL32UTF8
--修改oracle数据库字符集：（在SQL Plus中）
sql> conn /  as  sysdba;
sql> shutdown immediate;
database  closed.
database  dismounted.
oracle instance shut down.
sql> startup mount;
oracle instance started.
total system  global  area 135337420 bytes
fixed  size  452044 bytes
variable  size  109051904 bytes
database  buffers 25165824 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  internal_use JA16SJIS;
sql> shutdown immediate;
sql> startup;

二、修改pl/sql developer 的编码

　　在windows中创 建一个名为“NLS_LANG”的系统环境变量，设置其值为“SIMPLIFIED CHINESE_CHINA.ZHS16GBK”，然后重新启动 pl/sql developer，这样检索出来的中文内容就不会是乱码了。如果想转换为UTF8字符集，可以赋予“NLS_LANG”为 “AMERICAN_AMERICA.UTF8”，然后重新启动 pl/sql developer。其它字符集设置同上