登录Oracle数据库报错：ORA-01034: ORACLE not available ORA-27101: shared memory realm does not exist

处理步骤：

1、在Oracle安装路径下找到\oracle\product\11.2.0\dbhome_1\NETWORK\ADMIN\tnsnames.ora，

打开该文件，找到“(ADDRESS = (PROTOCOL = TCP)(HOST = **************)(PORT = 1521))”，并复制

2、在Oracle安装路径下查找\oracle\admin\orcl\pfile\init.ora.0122213856132,

打开该文件，找到local_listener="(ADDRESS = (PROTOCOL = TCP)(HOST = localhost)(PORT = 1521))"，选中并粘贴

3、打开cmd，输入：

sqlplus/nolog

conn sys as sysdba;

startup

startup pfile:'D:\oracle\admin\orcl\pfile\init.ora.0122213856132';

执行完以上步骤会提示数据库已装载完毕，数据库已打开