Connection to sys should be as sysdba or sysoper
ORA-28008 – Oracle Error Code
Invalid old password
ORA-28007 – Oracle Error Code
The password cannot be reused
ORA-28006 – Oracle Error Code
Conflicting values for parameters string and string
ORA-28005 – Oracle Error Code
Invalid logon flags
ORA-28004 – Oracle Error Code
Invalid argument for function specified in PASSWORD_VERIFY_FUNCTION string
ORA-28003 – Oracle Error Code
Password verification for the specified password failed
ORA-28002 – Oracle Error Code
The password will expire within string days
ORA-28001 – Oracle Error Code
The password has expired
ORA-28000 – Oracle Error Code
The account is locked