查詢oracle 表空間剩餘（當前使用者具有dba許可權才可以）
select tablespace_name "表空間",
to_char(round(bytes / 1024, 2), '99990.00')
|| '' "實有",
to_char(round(free / 1024, 2), '99990.00')
|| 'g' "現有",
to_char(round(( bytes - free ) / 1024, 2), '99990.00')
|| 'g' "使用",
to_char(round(10000 * used / bytes) / 100, '99990.00')
|| '%' "比例"
from (select a.tablespace_name tablespace_name,
floor(a.bytes / ( 1024 * 1024 )) bytes,
floor(b.free / ( 1024 * 1024 )) free,
floor(( a.bytes - b.free ) / ( 1024 * 1024 )) used
from (select tablespace_name tablespace_name,
sum(bytes) bytes
from dba_data_files
group by tablespace_name) a,
(select tablespace_name tablespace_name,
sum(bytes) free
from dba_free_space
group by tablespace_name) b
where a.tablespace_name = b.tablespace_name);
查詢表空間名稱，使用量
select
a.tablespace_name 表空間名稱,
total 總計,
total - free 已使用,
free 空閒,
round((total - free) / total * 100, 2) 使用佔比
from (
select tablespace_name
, round(sum(bytes) / 1024 / 1024) as total
from dba_data_files
group by tablespace_name
) aleft join (
select tablespace_name
, round(sum(bytes) / 1024 / 1024) as free
from dba_free_space
group by tablespace_name
) bon a.tablespace_name = b.tablespace_name
order by (total - free) / total desc;
查詢表空間檔案位置
select t1.name,t2.name from v$tablespace t1,v$datafile t2where t1.ts# = t2.ts#;
為表空間dataspace 新增乙個初始空間50m的可以自增長的資料檔案，最大可以到3200m
alter tablespace dataspace add datafile
'/u02/oradata/source/windinfo_14.dbf' size 50m
autoextend on next 50m maxsize 32000m;
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