| Oracle® Database Reference 11g Release 1 (11.1) Part Number B28320-01  | 
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DBA_LMT_USED_EXTENTS describes the extents comprising the segments in all locally managed tablespaces in the database.
| Column | Datatype | NULL | Description | 
|---|---|---|---|
SEGMENT_FILEID | 
NUMBER | 
File number of the segment header of the extent | |
SEGMENT_BLOCK | 
NUMBER | 
Block number of the segment header of the extent | |
TABLESPACE_ID | 
NUMBER | 
Identifier number of the tablespace containing the extent | |
EXTENT_ID | 
NUMBER | 
Extent number in the segment | |
FILEID | 
NUMBER | 
File identifier number of the file containing the extent | |
BLOCK | 
NUMBER | 
Starting block number of the extent | |
LENGTH | 
NUMBER | 
Number of blocks in the extent |