An entry for each datafile.
Columns ___________________________ FILE# NAME TS# RFILE# STATUS ENABLED CHECKPOINT_CHANGE# CHECKPOINT_TIME UNRECOVERABLE_CHANGE# UNRECOVERABLE_TIME LAST_CHANGE# LAST_TIME OFFLINE_CHANGE# ONLINE_CHANGE# ONLINE_TIME BYTES BLOCKS CREATE_BYTES CREATION_CHANGE# CREATION_TIME BLOCK_SIZE PLUGGED_IN BLOCK1_OFFSET AUX_NAME
Example
select name, status from v$datafile
Related:
dba_data_files V$COMPATIBILITY V$COMPATSEG V$COPY_CORRUPTION V$DATABASE V$DATAFILE_COPY V$DATAFILE_HEADER V$DBFILE V$DBLINK V$DB_PIPES V$TABLESPACE V$TEMPFILE V$VERSION