1、启动 PL/SQL Developer 报字符编码不一致错误Database character set (AL32UTF8) and Client character set (ZHS16GBK) are different.Character set conversion may cause unexpected results.Note: you can set the client character set through the NLS_LANG environment variable or the NLS_LANG registry key inHKEY_LOCAL_MACHI
2、NESOFTWAREORACLEKEY_Oracle_10g.打开注册表,通过命令 regedit。找到到文中提示的路径，发现 NLS_LANG键的值为:SIMPLIFIED CHINESE_CHINA.ZHS16GBK修改为：SIMPLIFIED CHINESE_CHINA.AL32UTF8 即可还有一种可能是由于安装 11g的时候没选择自定义安装造成的Database character set (AL32UTF8) and Client character set (ZHS16GBK) are different.Character set conversion may cause un
3、expected results.Note: you can set the client character set through the NLS_LANG environment variable or the NLS_LANG registry key inHKEY_LOCAL_MACHINE/SOFTWARE/ORACLE/KEY_OraDb11g_homeSIMPLIFIED CHINESE_CHINA.ZHS16GBK 包含 AMERICAN_AMERICA.AL32UTF8.这可是个麻烦事，不是改客户端字符集的问题。要改数据库的字符集：SQL conn /as sysdbaSQ
4、L shutdown immediate;SQL startup mountSQL ALTER SYSTEM ENABLE RESTRICTED SESSION;SQL ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;SQL ALTER SYSTEM SET AQ_TM_PROCESSES=0;SQL alter database open;SQL ALTER DATABASE CHARACTER SET ZHS16GBK;ORA-12712: new character set must be a superset of old character set提示我
5、们的字符集：新字符集必须为旧字符集的超集，这时我们可以跳过超集的检查做更改：SQL ALTER DATABASE character set INTERNAL_USE ZHS16GBK;-我们看到这个过程和之前 ALTER DATABASE CHARACTER SET操作的内部过程是完全相同的，也就是说 INTERNAL_USE提供的帮助就是使 Oracle数据库绕过了子集与超集的校验.SQL select * from v$nls_parameters; SQL shutdown immediate;SQL startupSQL select * from v$nls_parameters;以后安装 oracle11g的时候记得选择自定义安装，把这个字符集的事情事先弄好
