Query DBA_EXTENTS for Extent number in the segment, Starting block number for the extent, Size of the extent in bytes, Size of the extent, in Oracle blocks : dba_extents « System Tables Data Dictionary « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » System Tables Data Dictionary » dba_extents

30. 30. 3. Query DBA_EXTENTS for Extent number in the segment, Starting block number for the extent, Size of the extent in bytes, Size of the extent, in Oracle blocks


SQL> select

  6        Extent_ID,         /*Extent number in the segment*/

  7        Block_ID,          /*Starting block number for the extent*/

  8        Bytes,             /*Size of the extent, in bytes*/

  9        Blocks             /*Size of the extent, in Oracle blocks*/

 10   from DBA_EXTENTS

 11  where Segment_Name = 'segment_name'

 12  order by Extent_ID;

SQL>

SQL>

30. 30. dba_extents
	30. 30. 1.	Join dba_extents and dba_rollback_segs
	30. 30. 2.	Query dba_extents for segment name
	30. 30. 3.	Query DBA_EXTENTS for Extent number in the segment, Starting block number for the extent, Size of the extent in bytes, Size of the extent, in Oracle blocks
	30. 30. 4.	Query DBA_EXTENTS for Name of the segment, Type of segment (ex. TABLE, INDEX)
	30. 30. 5.	Query DBA_EXTENTS for Tablespace name,Owner of the segment
	30. 30. 6.	Log dba_extents

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