How to use log miner in Oracle Database

 How to use log miner in Oracle Database

SELECT * 
FROM V$ARCHIVED_LOG
WHERE FIRST_CHANGE# <= 12435785206731 
AND NEXT_CHANGE# >= 12435785206731;

EXECUTE DBMS_LOGMNR.ADD_LOGFILE( -
  LOGFILENAME => 'arch file', -
  OPTIONS => DBMS_LOGMNR.NEW);

EXECUTE DBMS_LOGMNR.START_LOGMNR( -
   OPTIONS => DBMS_LOGMNR.DICT_FROM_ONLINE_CATALOG);

SELECT username AS USR, (XIDUSN || '.' || XIDSLT || '.' ||  XIDSQN) AS XID, SQL_REDO, SQL_UNDO FROM V$LOGMNR_CONTENTS where XIDUSN=49 and XIDSLT=25 and XIDSQN=22415431;

EXECUTE DBMS_LOGMNR.END_LOGMNR();