Below query will give you the last added datafile in oracle.
This will be useful to check whenever you have datafile related issues.
DBA_HIST_DATAFILE is the view stores information of datafiles.
select a.FILE#,a.FILENAME,a.TSNAME,b.creation_time from DBA_HIST_DATAFILE a,V$datafile b where a.FILE#=b.FILE# order by b.creation_time;
This will be useful to check whenever you have datafile related issues.
DBA_HIST_DATAFILE is the view stores information of datafiles.
select a.FILE#,a.FILENAME,a.TSNAME,b.creation_time from DBA_HIST_DATAFILE a,V$datafile b where a.FILE#=b.FILE# order by b.creation_time;