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Oracle遇到问题 :在PL/SQL当输入用户名和密码后 竟然出现标题上错误,我一项目数据库数据库全都没有备份,还有很多很多数据,该

Oracle遇到问题 :在PL/SQL当输入用户名和密码后 竟然出现标题上错误,我一项目数据库数据库全都没有备份,还有很多很多数据,该不会让我重装数据库吧,想到这个我汗那个流啊。

在网上查了下 看了看文章,还有解决办法,真让我裂了把汗。出现这个问题多半是由于数据库文件丢失。

Oracle在启动后,用户登录时是要将方案中原有配置信息装载进入,装载过程中遇到原有文件指定的位置上没有找到,所以就报出错误。

下面是我在网上查询找到的解决办法:

进入dos:

以DBA用户登录,具体命令是
sqlplus /NOLOG
SQL>connect sys/change_on_install as sysdba
提示:已成功

SQL>shutdown normal
提示:数据库已经关闭
已经卸载数据库
ORACLE 例程已经关闭

SQL>startup mount
提示:ORACLE例程已经启动
Total System Global Area 118255568 bytes
Fixed Size                  282576 bytes
Variable Size            82886080 bytes
Database Buffers          33554432 bytes
Redo Buffers                532480 bytes
数据库装载完毕

SQL>alter database open;
提示:
第 1 行出现错误:
ORA-01157: 无法标识/锁定数据文件 19 - 请参阅 DBWR 跟踪文件
ORA-01110: 数据文件 19: ''''C:\oracle\oradata\oradb\FYGL.ORA''
这个提示文件部分根据每个人不同情况有点差别。

继续输入
SQL>alter database datafile 19 offline drop;
提示:数据库已更改。

循环使用最后两步,直到alter database open;后不再提示错误,出现“数据库已更改”。
然后接着输入即可
SQL>shutdown normal
提示:数据库已经关闭
已经卸载数据库
ORACLE 例程已经关闭

SQL>startup
提示:ORACLE例程已经启动
Total System Global Area 118255568 bytes
Fixed Size                  282576 bytes
Variable Size            82886080 bytes
Database Buffers          33554432 bytes
Redo Buffers                532480 bytes
数据库装载完毕

然后在登陆应该就没问题了!

因为创建了新的库,ORACLE_SID也就发生了变化,在用户登录的时候会有ORA-12560错误,解决这个问题是将系统注册表中的HKEY_LOCAL_MACHINE\SOFTWARE\ORACLE\HOME0\ORACLE_SID
键值修改成之前那个SID就可以了,,用户也能就能正常登录了。

相关阅读:

GoldenGate不使用数据泵完成Oracle-Oracle的双向复制

使用GoldenGate的数据泵进行Oracle-Oracle的单向复制

如何对 Oracle 数据泵(expdp/impdp) 进行 debug

Oracle 数据库导出数据泵(EXPDP)文件存放的位置

Oracle 10g 数据泵分区表的导出

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