ORA-01092: ORACLE instance terminated. Disconnection forced问

升级数据字典，解决ORA-01092: ORACLE instance terminated. Disconnection forced问题。

升级数据字典，，解决ORA-01092: Oracle instance terminated. Disconnection forced问题。

在Oracle 实例关闭的情况下，Oracle 软件从10.2.0.1 升级到 10.2.0.5 之后，存在的数据库也要升级。

此时启动实例会报错 ORA-01092: ORACLE instance terminated. Disconnection forced

SQL> alter database open;

ERROR at line 1:

ORA-01092: ORACLE instance terminated. Disconnection forced

第一步，通过startup upgrade启动实例

SQL> startup upgrade;

ORACLE instance started.

Total System Global Area 322961408 bytes

Fixed Size 2095992 bytes

Variable Size 100664456 bytes

Database Buffers 213909504 bytes

Redo Buffers 6291456 bytes

Database mounted.

Database opened.

第二步，升级数据字典和实例等。

SQL>@ORACLE_HOME\rdbms\admin\catupgrd.sql