ALL_FILE_GROUPS shows top-level metadata about the file groups accessible to the current user.
DBA_FILE_GROUPS shows top-level metadata about all file groups in the database.
USER_FILE_GROUPS shows top-level metadata about file groups owned by the current user. This view does not display the FILE_GROUP_OWNER column.
| Column | Datatype | NULL | Description | 
|---|---|---|---|
| FILE_GROUP_OWNER | VARCHAR2(30) | NOT NULL | Owner of the file group | 
| FILE_GROUP_NAME | VARCHAR2(30) | NOT NULL | Name of the file group | 
| KEEP_FILES | VARCHAR2(1) | NOT NULL | A value of Y or N to indicate whether or not files should be deleted when a version is purged | 
| MIN_VERSIONS | NUMBER | NOT NULL | Autopurge should not drop a version if this condition will become violated | 
| MAX_VERSIONS | NUMBER | NOT NULL | Autopurge will drop the oldest version when this condition is violated | 
| RETENTION_DAYS | NUMBER | NOT NULL | Autopurge will drop versions older than this if doing so does not violate MIN_VERSIONS | 
| CREATED | TIMESTAMP(6) WITH TIME ZONE | NOT NULL | Time at which the file group was created | 
| COMMENTS | VARCHAR2(4000) | Comments about the file group | |
| DEFAULT_DIRECTORY | VARCHAR2(30) | Name of the default directory object |