V$FILESPACE_USAGE

V$FILESPACE_USAGE summarizes space allocation information of each datafile and tempfile.

Column	Datatype	Description
`TABLESPACE_ID`	`NUMBER`	ID of the tablespace to which the file belongs
`RFNO`	`NUMBER`	Relative file number of the file
`ALLOCATED_SPACE`	`NUMBER`	Total allocated space in the file
`FILE_SIZE`	`NUMBER`	Current file size
`FILE_MAXSIZE`	`NUMBER`	Maximum file size
`CHANGESCN_BASE`	`NUMBER`	SCN base of the last change to the file
`CHANGESCN_WRAP`	`NUMBER`	SCN wrap of the last change to the file
`FLAG`	`NUMBER`	Flags for file attributes