• Fewer and more consolidated tablespaces

• Locally Managed Tablespaces

• Accounts for the I/O characteristics of an object

• Reclaims space after migration

• Real Application Cluster (RAC) Support

-- list all tablespaces with their associated files, the 

-- tablespace\'s allocated space, free space, and the 

-- next free extent:
clear breaks
SET linesize 130SET pagesize 60
break ON tablespace_name skip 1
col tablespace_name format a15
col file_name format a50
col tablespace_kb heading \'TABLESPACE|TOTAL KB\'
col kbytes_free heading \'TOTAL FREE|KBYTES\'
 
SELECT dd.tablespace_name tablespace_name, dd.file_name file_name, dd.bytes/1024 TABLESPACE_KB, SUM(fs.bytes)/1024 KBYTES_FREE, MAX(fs.bytes)/1024 NEXT_FREE
FROM sys.dba_free_space fs, sys.dba_data_files dd
WHERE dd.tablespace_name = fs.tablespace_name
AND dd.file_id = fs.file_id
GROUP BY dd.tablespace_name, dd.file_name, dd.bytes/1024ORDER BY dd.tablespace_name, dd.file_name;
 
 
-- list datafiles, tablespace names, and size in MB:
 
col file_name format a50
col tablespace_name format a10

SELECT file_name, tablespace_name, ROUND(bytes/1024000) MB
FROM dba_data_files
ORDER BY 1;
  
 
-- list tablespaces, size, free space, and percent free

-- query originally developed by Michael Lehmann SELECT df.tablespace_name TABLESPACE, df.total_space TOTAL_SPACE,
fs.free_space FREE_SPACE, df.total_space_mb TOTAL_SPACE_MB,(df.total_space_mb - fs.free_space_mb) USED_SPACE_MB,
fs.free_space_mb FREE_SPACE_MB,ROUND(100 * (fs.free_space / df.total_space),2) PCT_FREE
FROM (SELECT tablespace_name, SUM(bytes) TOTAL_SPACE,
      ROUND(SUM(bytes) / 1048576) TOTAL_SPACE_MB
      FROM dba_data_files
      GROUP BY tablespace_name) df,
     (SELECT tablespace_name, SUM(bytes) FREE_SPACE,
       ROUND(SUM(bytes) / 1048576) FREE_SPACE_MB
       FROM dba_free_space
       GROUP BY tablespace_name) fs
WHERE df.tablespace_name = fs.tablespace_name(+)ORDER BY fs.tablespace_name;