Objects in a tablespace or datafile ???

Question

How do we find out what objects ( tables, indexes etc ) are there in a particular tablespace ?
Is there a way to find which object is in a particular datafile if the tablespace has more than one datafile ?

Answer 1

Objects in tablespace:
SELECT segment_name, segment_type
FROM dba_segments
WHERE tablespace_name = 'YOUR_TABLESPACE';Object in datafile:
SELECT DISTINCT e.segment_name, e.segment_type, f.file_name
FROM dba_extents e, dba_data_file f
WHERE e.file_id = f.file_id and
      e.tablespace_name = 'YOUR_TABLEPACE'Note that a segment may be in more than one data file, so the second query can return multiple rows.
If you only care about what segments have at least one extent in data file x, then:
SELECT DISTINCT e.segment_name, e.segment_type
FROM dba_extents e, dba_data_file f
WHERE e.file_id = f.file_id and
      f.file_name = 'your_file_name'TTFN
John