how to set the log sequence number in oracle database

SQL> select log_mode from v$database;

LOG_MODE
------------
ARCHIVELOG

SQL> select log_mode from v$database;

LOG_MODE
------------
ARCHIVELOG

SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination e:\ARCHIVEDLOGS\
Oldest online log sequence 8
Next log sequence to archive 10
Current log sequence 10


SQL> shu immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.

SQL> startup mount;
ORACLE instance started.

Total System Global Area 535662592 bytes
Fixed Size 1334380 bytes
Variable Size 176161684 bytes
Database Buffers 352321536 bytes
Redo Buffers 5844992 bytes
Database mounted.

SQL> alter database open resetlogs;
alter database open resetlogs
*
ERROR at line 1:
ORA-01139: RESETLOGS option only valid after an incomplete database recovery
sql>recover database until cancel;

SQL> recover database until cancel;
Media recovery complete.

SQL> recover database until cancel;
Media recovery complete.
SQL> alter database open resetlogs;

Database altered.

SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination e:\ARCHIVEDLOGS\
Oldest online log sequence 1
Next log sequence to archive 1
Current log sequence 1



SQL> alter system archive log current;

System altered.

SQL> archive log list;
Database log mode Archive Mode
Automatic archival Enabled
Archive destination e:\ARCHIVEDLOGS\
Oldest online log sequence 1
Next log sequence to archive 2
Current log sequence 2