--------------------------------------------------------
-- free.sql
-- This SQL Plus script lists freespace by tablespace
-- (o)riginally by Tom Kyte
-- https://loopback.org/kb/c/show-free-space-in-tablespaces_8159377/
--------------------------------------------------------
set linesize 200
set pagesize 999
column dummy noprint
column  pct_used format 999.9       heading "%|Used"
column  name    format a19      heading "Tablespace Name"
column  Kbytes   format 9,999,999,999    heading "KBytes"
column  used    format 9,999,999,999   heading "Used"
column  free    format 9,999,999,999  heading "Free"
column  largest    format 9,999,999,999  heading "Largest"
column  max_size format 9,999,999,999 heading "MaxPoss|Kbytes"
column  pct_max_used format 999.9       heading "%|Max|Used"
break   on report
compute sum of kbytes on report
compute sum of free on report
compute sum of used on report
select (select decode(extent_management,'LOCAL','*',' ')
         from dba_tablespaces where tablespace_name = b.tablespace_name) ||
nvl(b.tablespace_name,
            nvl(a.tablespace_name,'UNKOWN')) name,
      kbytes_alloc kbytes,
      kbytes_alloc-nvl(kbytes_free,0) used,
      nvl(kbytes_free,0) free,
      ((kbytes_alloc-nvl(kbytes_free,0))/
                         kbytes_alloc)*100 pct_used,
      nvl(largest,0) largest,
      nvl(kbytes_max,kbytes_alloc) Max_Size,
      decode( kbytes_max, 0, 0, (kbytes_alloc/kbytes_max)*100) pct_max_used
from ( select sum(bytes)/1024 Kbytes_free,
             max(bytes)/1024 largest,
             tablespace_name
      from  sys.dba_free_space
      group by tablespace_name ) a,
    ( select sum(bytes)/1024 Kbytes_alloc,
             sum(maxbytes)/1024 Kbytes_max,
             tablespace_name
      from sys.dba_data_files
      group by tablespace_name
      union all
     select sum(bytes)/1024 Kbytes_alloc,
             sum(maxbytes)/1024 Kbytes_max,
             tablespace_name
      from sys.dba_temp_files
      group by tablespace_name )b
where a.tablespace_name (+) = b.tablespace_name;