Starting with Oracle 12.1, you can relocate Datafile ONLINE with no need to shutdown the database,
ALTER DATABASE MOVE DATAFILE ( ‘filename’ | ‘ASM_filename’ | file_number )
[ TO ( ‘filename’ | ‘ASM_filename’ ) ]
[ REUSE ] [ KEEP ]
Starting with Oracle 12.1, you can relocate Datafile ONLINE with no need to shutdown the database,
ALTER DATABASE MOVE DATAFILE ( ‘filename’ | ‘ASM_filename’ | file_number )
[ TO ( ‘filename’ | ‘ASM_filename’ ) ]
[ REUSE ] [ KEEP ]