Need a query

Question

i have tablespace which is 124GB in size.
i ran a query i found out that 86gb space is occupied and 37 gb is freespace..
this tablespace is having 19 datafiles which spreads across to diffrent locations in the disk.
i want tto find out for each datafile how much space is used and how much is free?
i ran a query using dba_free_space,dba_data_files using fileid as common but its giving absurd results..may be iam wrong here..
can any give me the exact query please..
Thanks
Its urgent!!!
regards
NK

Answer 1

also kindly let me know wat is wrong in the query:
col file_name format a66
select file_name,
ceil( (nvl(hwm,1)*16384)/1024/1024 ) possible,
ceil( blocks*16384/1024/1024) current,
ceil( blocks*16384/1024/1024) -
from dba_data_files a,
( select file_id, max(block_id+blocks-1) hwm
from dba_extents
group by file_id ) b
where a.file_id = b.file_id(+) and a.tablespace_name
= '&tsname'
wen i give the name of the TS and hit enter it give
me an error:
ceil( (nvl(hwm,1)*16384/1024/1024 ) saving
line 5:
ORA-00923: FROM keyword not found where expectedThe error is the use of the reserved word "current"
SQL> col keyword format a10
SQL> col reserved format a10
SQL> col res_type format a10
SQL> col res_attr format a10
SQL> col res_semi format a10
SQL> col duplicate format a3
SQL> select *
  2  from v$reserved_words
  3  where keyword = 'CURRENT';
KEYWORD        LENGTH RESERVED   RES_TYPE   RES_ATTR   RES_SEMI   DUP
CURRENT             7 N          N          N          Y          NAs this shows, the word "current" is semi reserved and this means that it can't be used as an identifier in some situations such that DML statements