How to Enable Oracle Change Tracking (BCT)?

How to Enable Oracle Change Tracking (BCT)? ===

 

SHOW PARAMETER DB_CREATE_FILE_DEST   File will create here 
 

--To Enable : 
ALTER DATABASE ENABLE BLOCK CHANGE TRACKING ;
 
--To check 
col filename for a70
select filename,status from v$block_change_tracking;
 
====
--to disable:
alter database disable block change tracking; 
 
--To check
col filename for a70
select filename,status from v$block_change_tracking;


or

set linesize 400
col FILENAME for a70
col NAME for a15
col BCT_STATUS for a15
col MB for 99999.99
select inst_id, dbid, name, db_unique_name, open_mode, log_mode, flashback_on, switchover_status, database_role,CONTROLFILE_TYPE,filename, BCT_STATUS, bytes/1024/1024 MB
             from (select inst_id, dbid, name, db_unique_name, open_mode, log_mode, flashback_on, switchover_status, database_role,CONTROLFILE_TYPE  from gv$database),
                  (select filename, status BCT_STATUS, bytes    from   v$block_change_tracking)
;