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 | cmd -> sqlplus  SQL> select group#,sequence#,archived,status from v$log;
 
 GROUP#  SEQUENCE# ARC STATUS
 \
 1         86 NO  INACTIVE
 2         87 NO  INVALIDATED
 3         85 NO  INACTIVE
 
 alter database clear logfile group 1;
 alter database clear logfile group 2;
 alter database clear logfile group 3;
 shutdown immediate;
 startup mount;
 SQL> select group#,sequence#,archived,status from v$log;
 GROUP#  SEQUENCE# ARC STATUS
 \
 1         88 NO  CURRENT
 2          0 NO  UNUSED
 3          0 NO  UNUSED
 alter database clear logfile group 1;
 alter database clear unarchived logfile group 1;
 alter database clear logfile group 2;
 alter database clear unarchived logfile group 2;
 alter database clear logfile group 3;
 alter database clear unarchived logfile group 3;
 shutdown;
 startup mount;
 alter database open;
 
 
 |