-- 統計表空間
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)
--where tablespace_name like 'cdr%'
order by floor(10000 * used / bytes) desc;
--3 檢視oracle使用者佔了哪幾個表空間及大小
select *
from (select owner || '.' || tablespace_name name, sum(b) g
from (select owner,
t.segment_name,
t.partition_name,
round(bytes / 1024 / 1024 / 1024, 2) b,
tablespace_name
from dba_segments t)
where owner not in
('sys', 'outln', 'system', 'tsmsys', 'dbsnmp', 'wmsys')
group by owner || '.' || tablespace_name)
order by name;
--4. 檢視表、索引占用空間大小
select owner,segment_name,bytes/1024/1024 from dba_segments where owner='某使用者' order by 3 desc;
--5.清空**站
purge user_recyclebin;
purge dba_recyclebin;
--6.收縮表
alter table hkta.tsharedetail enable row movement;
alter table hkta.tsharedetail shrink space cascade;
alter table hkta.tsharedetail disable row movement;
--7收縮索引
alter index itrequest_his shrink space;
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