ORA-01034: ORACLE not available解决

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原文链接：https://www.cnblogs.com/xiaochina/p/7510239.html

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#oracle

本文详细记录了解决Oracle数据库中遇到的用户解锁问题的过程，包括设置ORACLE_SID环境变量，确认实例状态，以及使用正确的SQL*Plus命令连接到指定的数据库实例。通过这些步骤，成功解锁了Scott用户，并更改了其密码。

本文转载自： https://www.cnblogs.com/xiaochina/p/7510239.html 作者：xiaochina 转载请注明该声明。

问题现象：

alter user scott account unlock;

ERROR at line 1:
ORA-01034: ORACLE not available
Process ID: 0
Session ID: 0 Serial number: 0

[oracle@rhel ~]$ echo $ORACLE_SID
xxxx
[oracle@rhel ~]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Tue Sep 12 14:58:57 2017

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> select userenv('language') from udal;
select userenv('language') from udal
* ERROR at line 1: ORA-01034: ORACLE not available Process ID: 0 Session ID: 0 Serial number: 0

问题解决：

确认当前实例对不

export ORACLE_SID=xxxx --设置

echo $ORACLE_SID=xxxx --查看

查看监听状态

lsnrctl status

sqlplus sys/123123@sznfpt as sysdba #明确登录的用户及实例，就OK了

[oracle@rhel ~]$ sqlplus sys/123123@sznfpt as sysdba

SQL*Plus: Release 11.2.0.4.0 Production on Tue Sep 12 15:02:47 2017

Copyright (c) 1982, 2013, Oracle.  All rights reserved.


Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options

SQL> 
SQL> 
SQL> alter user scott account unlock;

User altered.

SQL> 
SQL> 
SQL> alter user scott identified by 123123;

User altered.

SQL>