在win7上运行oracle10g时，可能要以管理员权限运行。还有可能有其他问题，如：
ERRORORA-01017invalid usernamepassword
SQL> conn / as sysdba SQL> alter user SCOTT account unlock identified by tiger;
User altered.
SQL> select username,account_status from dba_users where username='SCOTT'; USERNAME ACCOUNT_STATUS ------------------------------ -------------------------------- SCOTT OPEN
SQL> conn scott/tiger Connected.
SQL> select * from tab;