1.修改参数

alter system set sec_case_sensitive_logon=false;

2.修改SQLNET.ORA

SQLNET.ALLOWED_LOGON_VERSION_SERVER=8

SQLNET.ALLOWED_LOGON_VERSION_CLIENT=8

3.修改一下用户密码

alter user ttt identified by ttt123;

4.无关大小写

SQL> conn ttt/[email protected]:1521/orcl;

Connected.

SQL> conn ttt/[email protected]:1521/orcl;

Connected.