查看表空间

select   a.tablespace_name,a.bytes/1024/1024 "Sum MB",(a.bytes-b.bytes)/1024/1024   "used MB",b.bytes/1024/1024 "free MB",round(((a.bytes-b.bytes)/a.bytes)*100,2) "percent_used"  from (select tablespace_name,sum(bytes) bytes from dba_data_files group by tablespace_name)   a, (select tablespace_name,sum(bytes) bytes,max(bytes) 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 ;

TABLESPACE_NAME Sum MB used MB     free MB    percent_used
--------------- ------ ----------- ---------- ------------
CBS             420000 325152.8125 94847.1875        77.42
IND_CBS         180720 134444.1875 46275.8125        74.39
SYSAUX           30000   1895.8125 28104.1875         6.32
SYSTEM           30000   1242.6875 28757.3125         4.14
OGG_TS           30720     515.125  30204.875         1.68
UNDOTBS1         60000      609.75   59390.25         1.02
UNDOTBS2         60000       406.5    59593.5         0.68
USERS             1024           1       1023          0.1

select sum(bytes)/(1024*1024) as free_space,tablespace_name from dba_free_space group by tablespace_name;