Oracle（ERROR SP2-0642）
报错信息
ERROR SP2-0642
解决方法
[oracle@oradb]$ sqlplus / as sysdba
SP2-0642: SQL*Plus internal error state 2021, context 1:1821:0
Unsafe to proceed
SP2-1503: Unable to initialize Oracle call interface
SP2-0152: ORACLE may not be functioning properly
The cause of this error on my system was the date format.
Solution: at least in my case, it was the date format that was the issue
[oracle@oradb]$ export NLS_DATE_FORMAT='YYYY-MON-DD HH24:MI:SS'
[oracle@oradb]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.1.0 Production on Wed Jul 2 13:31:30 2014
Copyright (c) 1982, 2009, Oracle. All rights reserved.
Connected to an idle instance.
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原文地址：https://www.cnblogs.com/mjiu/p/9856354.html#_label1