V$FILESPACE_USAGE

V$FILESPACE_USAGE summarizes space allocation information of each data file and temp file.

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
`CON_ID`	`NUMBER`	The ID of the container to which the data pertains. Possible values include: `0`: This value is used for rows containing data that pertain to the entire CDB. This value is also used for rows in non-CDBs. `1`: This value is used for rows containing data that pertain to only the root n: Where n is the applicable container ID for the rows containing data