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Oracle® Database Reference
10g Release 1 (10.1)

Part Number B10755-01
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DBA_EXTENTS

DBA_EXTENTS describes the extents comprising the segments in all tablespaces in the database.


Related View

USER_EXTENTS describes the extents comprising the segments owned by the current user's objects. This view does not display the OWNER, FILE_ID, BLOCK_ID, or RELATIVE_FNO columns.

Column Datatype NULL Description
OWNER VARCHAR2(30)
Owner of the segment associated with the extent
SEGMENT_NAME VARCHAR2(81)
Name of the segment associated with the extent
PARTITION_NAME VARCHAR2(30)
Object Partition Name (Set to NULL for non-partitioned objects)
SEGMENT_TYPE VARCHAR2(18)
Type of the segment: INDEX PARTITION, TABLE PARTITION
TABLESPACE_NAME VARCHAR2(30)
Name of the tablespace containing the extent
EXTENT_ID NUMBER   Extent number in the segment
FILE_ID NUMBER   File identifier number of the file containing the extent
BLOCK_ID NUMBER   Starting block number of the extent
BYTES NUMBER
Size of the extent in bytes
BLOCKS NUMBER   Size of the extent in Oracle blocks
RELATIVE_FNO NUMBER   Relative file number of the first extent block


See Also:

"USER_EXTENTS"