Table segment information

COLUMN segment_type                                  HEADING "Segment Type"
COLUMN bytes               FORMAT 9,999,999,999,999  HEADING "Bytes"
COLUMN extents             FORMAT 999,999,999        HEADING "Extents"
COLUMN initial_extent      FORMAT 999,999,999,999    HEADING "Initial|Extent"
COLUMN next_extent         FORMAT 999,999,999,999    HEADING "Next|Extent"
COLUMN min_extents         FORMAT 999                HEADING "Min|Extents"
COLUMN max_extents         FORMAT 9,999,999,999      HEADING "Max|Extents"
COLUMN pct_increase        FORMAT 999.00             HEADING "Pct|Increase"
COLUMN freelists                                     HEADING "Free|Lists"
COLUMN freelist_groups                               HEADING "Free|List Groups"

SELECT 
    segment_type     segment_type
  , bytes            bytes
  , extents          extents
  , initial_extent   initial_extent
  , next_extent      next_extent
  , min_extents      min_extents
  , max_extents      max_extents
  , pct_increase     pct_increase
  , freelists        freelists
  , freelist_groups  freelist_groups
FROM
    dba_segments
WHERE
      owner        = UPPER('&schema_name')
  AND segment_name = UPPER('&table_name')
/