Each row in the SYSDBFILE system view describes a dbspace file. The underlying system table for this view is ISYSDBFILE.
| Column name | Data type | Description | 
|---|---|---|
| dbfile_id | SMALLINT | For internal use only. | 
| dbspace_id | SMALLINT | Each dbspace file in a database is assigned a unique number. The system dbspace contains all system objects and has a dbspace_id of 0. | 
| dbfile_name | CHAR(128) | 
       The file name for the dbspace.  | 
| file_name | LONG VARCHAR | A unique name for the dbspace. It is used in the CREATE TABLE command. | 
| lob_map | LONG VARBIT | For internal use only. | 
PRIMARY KEY (dbfile_id)
FOREIGN KEY (dbspace_id) REFERENCES SYS.ISYSDBSPACE (dbspace_id)
UNIQUE index (file_name)