因为之安装Oracle 10G的时候出了点问题，后来叫舍友重新发了一份Oralce 10g 客户端安装包过来装上去了。 当初使用PL/SQL是可以的，后来在因为工作需要，在一次导入同事发来的一份Oracle数据库备份，在命令符下使 用IMP 语句进行导入出现 6550错误，经上网查
因为之安装Oracle 10G的时候出了点问题，后来叫舍友重新发了一份Oralce 10g 客户端安装包过来装上去了。
当初使用PL/SQL是可以的，后来在因为工作需要，在一次导入同事发来的一份Oracle数据库备份，在命令符下使
用IMP 语句进行导入出现 6550错误，经上网查原因有是因为服务端与客户端使用的版本不匹配的一种说法。于是
不得已决定重装Oracle,发现卸载Oralce还是比较麻烦的，需要不少的步骤才能完全卸载，下面总结了一些步骤：
1.停止所有与ORACLE相关的服务。
2. 使用OUI(Oracle Universal Installer)卸载Oracle软件。
“开始”->“程序”->“Oracle-OraDb110g_home1|Oracle installation product|Universal installer.
3.删除注册表内容。
运行regedit命令，删除下面内容：HKEY_LOCAL_MACHINE|SOFTWARE|ORACLE注册表键，删除此键。
HKEY_LOCAL_MACHINE|SYSTEM|CurrentControlSet|Services，删除Services键下所有以oracle为首的键。
HKEY_LOCAL_MACHINE|SYSTEM|CurrentControlSet|Services|Eventlog|Application， 删除此键下所有以oracle为首的键。
HKEY_CLASSES_ROOT，删除此键下所有以Ora，，Oracle，Orcl，EnumOra 为前缀的键。
HKEY_CURRENT_USER|Software| Microsoft|Windows|CurrentVersion|Explorer|MenuOrder|Start Menu|Programs， 删除此键下所有以oracle为首的键。
HKEY_LOCAL_MACHINE|SOFTWARE|ODBC|ODBCINST.INI注册表键，删除了Microsoft ODBC FOR ORACLE注册表键以外的所有有Oracle字样的键值。
HKEY_我的系统上没找到相关的项
LOCAL_MACHINE|SYSTEM|CurrentControlSet|Services，删除以Oracle或OraWeb为前缀的键。
4. 删除环境变量。
删除环境变量CLASSPATH，PATH中含有Oracle字样的值。
5.最后在文件系统内删除ORACLE相关的文件及目录：删除系统盘符：Progrm FilesOracle目录;删除ORACLE_BASE目录。
我无法删除D：oracle目录，重新启动机器之后才删除。
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