取消ORACLE11g用户密码过期期限

从11g开始，用户账号默认6个月过期。
可以通过以下方法修改默认值。

sqlplus / as sysdba
set linesize 120
set pagesize 1000
select * from dba_profiles where profile='DEFAULT' and RESOURCE_TYPE='PASSWORD';

PROFILE                        RESOURCE_NAME                    RESOURCE LIMIT
------------------------------ -------------------------------- -------- ----------------------------------------
DEFAULT                        FAILED_LOGIN_ATTEMPTS            PASSWORD 10
DEFAULT                        PASSWORD_LIFE_TIME               PASSWORD 180
DEFAULT                        PASSWORD_REUSE_TIME              PASSWORD UNLIMITED
DEFAULT                        PASSWORD_REUSE_MAX               PASSWORD UNLIMITED
DEFAULT                        PASSWORD_VERIFY_FUNCTION         PASSWORD NULL
DEFAULT                        PASSWORD_LOCK_TIME               PASSWORD 1
DEFAULT                        PASSWORD_GRACE_TIME              PASSWORD 7


alter profile default limit PASSWORD_LIFE_TIME UNLIMITED;
alter profile default limit PASSWORD_GRACE_TIME UNLIMITED;