--表空間剩餘空間查詢,以system使用者身份登入或具有dba許可權的使用者執行：
select tbs as 表空間名稱,
sum(totalm) as 空間合計m,
sum(usedm) as 已使用空間,
sum(remainedm) as 剩餘空間m,
sum(usedm) / sum(totalm) * 100 as 已使用空間百分比,
sum(remainedm) / sum(totalm) * 100 as 剩餘空間百分比
from (select b.file_id id,
b.tablespace_name as tbs,
b.file_name as name,
b.bytes / 1024 / 1024 as totalm,
(b.bytes - sum(nvl(a.bytes, 0))) / 1024 / 1024 as usedm,
sum(nvl(a.bytes, 0)) / 1024 / 1024 as remainedm,
sum(nvl(a.bytes, 0)) / (b.bytes) * 100 as 剩餘百分比,
(100 - (sum(nvl(a.bytes, 0)) / (b.bytes) * 100)) as 已使用百分比
from dba_free_space a, dba_data_files b
where a.file_id = b.file_id
group by b.tablespace_name, b.file_name, b.file_id, b.bytes
order by b.tablespace_name)
group by tbs;
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