查询Oracle表空间的使用情况

select a.tablespace_name,a.all_bytes/1024/1024 "总大小(M)" ,b.free_bytes/1024/1024 "剩余大小(M)",
       round(((a.all_bytes - b.free_bytes)/a.all_bytes),3)*100 "使用百分比",round((b.free_bytes/a.all_bytes),3)*100 "剩余百分比"
from

( select  tablespace_name,sum(bytes) all_bytes from dba_data_files group by tablespace_name ) a,

( select tablespace_name,sum(bytes) free_bytes from dba_free_space group by tablespace_name )  b

where a.tablespace_name = b.tablespace_name;



spool  spool_read.txt;
set colsep '|';
set echo on;
set timing on;
set heading on;
set pagesize 0;
set termout on;
set trimout on;
set trimspool on;
set linesize 80;
select msisdn from table_name ;
spool off;
exit;