在使用pl/sql developer时,查询出来中文字段显示乱码,因为数据库的编号格式和pl /sql developer的编码格式不统一造成的。
一、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