Tablespace usage

for table space
====================
                                                                                                                                                                                               
                                           
set line 100
set pagesize 40
column dummy noprint
column pct_used format 999.9 heading "%|Used"
column name format a23 heading "Tablespace Name"
column Mbytes format 999,999,999,999 heading "Total_MB"
column used format 999,999,999,999 heading "Used_MB"
column free format 999,999,999,999 heading "Free_MB"
break on report
compute sum of kbytes on report
compute sum of free on report
compute sum of used on report

select nvl(b.tablespace_name,nvl(a.tablespace_name,'UNKOWN'))
name,
Mbytes_alloc Mbytes,
Mbytes_alloc-nvl(Mbytes_free,0) used,
nvl(Mbytes_free,0) free,
((Mbytes_alloc-nvl(Mbytes_free,0))/Mbytes_alloc)*100
pct_used
from ( select sum(bytes)/1024/1024 Mbytes_free,
tablespace_name
from sys.dba_free_space
group by tablespace_name ) a,
( select sum(bytes)/1024/1024 Mbytes_alloc,
tablespace_name
from sys.dba_data_files
group by tablespace_name )b
where a.tablespace_name (+) = b.tablespace_name
order by 4;



SELECT /* + RULE */  df.tablespace_name "Tablespace",
       df.bytes / (1024 * 1024) "Size (MB)",
       SUM(fs.bytes) / (1024 * 1024) "Free (MB)",
       Nvl(Round(SUM(fs.bytes) * 100 / df.bytes),1) "% Free",
       Round((df.bytes - SUM(fs.bytes)) * 100 / df.bytes) "% Used"
  FROM dba_free_space fs,
       (SELECT tablespace_name,SUM(bytes) bytes
          FROM dba_data_files
         GROUP BY tablespace_name) df
 WHERE fs.tablespace_name (+)  = df.tablespace_name
 GROUP BY df.tablespace_name,df.bytes
UNION ALL
SELECT /* + RULE */ df.tablespace_name tspace,
       fs.bytes / (1024 * 1024),
       SUM(df.bytes_free) / (1024 * 1024),
       Nvl(Round((SUM(fs.bytes) - df.bytes_used) * 100 / fs.bytes), 1),
       Round((SUM(fs.bytes) - df.bytes_free) * 100 / fs.bytes)
  FROM dba_temp_files fs,
       (SELECT tablespace_name,bytes_free,bytes_used
          FROM v$temp_space_header
         GROUP BY tablespace_name,bytes_free,bytes_used) df
 WHERE fs.tablespace_name (+)  = df.tablespace_name
 GROUP BY df.tablespace_name,fs.bytes,df.bytes_free,df.bytes_used
 ORDER BY 4 DESC;