当我查询表空间大小时，遇到如下命令：
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
但是输出时如下：
TABLESPACE_NAME
--------------------------------------------------------------------------------
Sum MB used MB free MB percent_used
---------- ---------- ---------- ------------
SYSTEM
830 824.5625 5.4375 99.34
SYSAUX
640 604.75 35.25 94.49
USERS
5 1.3125 3.6875 26.25
TABLESPACE_NAME
--------------------------------------------------------------------------------
Sum MB used MB free MB percent_used
---------- ---------- ---------- ------------
CHEZAISPACE01
18450 2449.875 16000.125 13.28
UNDOTBS1
15675 19.25 15655.75 .12
并不是表的格式，这时可以通过命令sql>set linesize 99999来解决，设置后如下：