让oracle 11G数据库用户的密码不区分大小写

用sys用户sqlplus连接到数据:
Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> show 　parameter  sec_case_sensitive_logon
 
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
sec_case_sensitive_logon             boolean     TRUE
SQL> ALTER SYSTEM SET SEC_CASE_SENSITIVE_LOGON = FALSE;
 
系统已更改。
 
SQL> show 　parameter  sec_case_sensitive_logon
 
NAME                                 TYPE        VALUE
------------------------------------ ----------- ------------------------------
sec_case_sensitive_logon             boolean     FALSE
SQL>