[已解决]使用sqlplus连接oracle，提示ORA-01034和ORA-27101

ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Process ID: 0
Session ID: 0 Serial number: 0

sqlplus /nolog

conn / as sysdba

startup

C:\Documents and Settings\Administrator>sqlplus /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on 星期六 8月 12 23:06:09 2023
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
SQL> conn / as sysdba
已连接到空闲例程。
SQL> startup
ORACLE 例程已经启动。
Total System Global Area  612368384 bytes
Fixed Size                  1250452 bytes
Variable Size             176163692 bytes
Database Buffers          432013312 bytes
Redo Buffers                2940928 bytes
数据库装载完毕。
数据库已经打开。
SQL>