Query to find ou the space associated with a tablespace

Question

hi gems...
I need to import a dump into a blank schema of a new database. For that I need to create two tablespaces. But there is space problem and thats why I need to assign nearly the exact space to the tablespaces which I will create.
So is there any query from which I can get the space taken by the source schema to the corresponding tablespaces???

Answer 1

-- check the total,used and free space in tablespaces
select     a.TABLESPACE_NAME,
     a.BYTES MB_total,
     b.BYTES MB_free,
     b.largest,
     a.BYTES-b.BYTES MB_used,
     round(((a.BYTES-b.BYTES)/a.BYTES)*100,2) percent_used
from
          select      TABLESPACE_NAME,
               sum(BYTES)/1048576 BYTES
          from      dba_data_files
          group      by TABLESPACE_NAME
     a,
          select      TABLESPACE_NAME,
               sum(BYTES)/1048576 BYTES ,
               max(BYTES)/1048576 largest
          from      dba_free_space
          group      by TABLESPACE_NAME
     b
where      a.TABLESPACE_NAME=b.TABLESPACE_NAME
order      by ((a.BYTES-b.BYTES)/a.BYTES) desc;
Regards
Asif Kabir