oracle表空間相關語句

1、檢視表空間檔案

select * from dba_data_files;

2、檢視使用者的預設表空間

select username,default_tablespace from dba_users;

3、檢視表空間大小

select t.tablespace_name, round(sum(bytes / (1024 * 1024)), 0) ts_size

from dba_tablespaces t, dba_data_files d
where t.tablespace_name = d.tablespace_name
group by t.tablespace_name;

select a.tablespace_name "表空間名",

total / (1024 * 1024 * 1024) "表空間大小(g)",
free / (1024 * 1024 * 1024) "表空間剩餘大小(g)",
(total - free) / (1024 * 1024 * 1024) "表空間使用大小(g)",
round((total - free) / total, 4) * 100 "使用率 %"
from (select tablespace_name, sum(bytes) free
from dba_free_space
group by tablespace_name) a,
(select tablespace_name, sum(bytes) total
from dba_data_files
group by tablespace_name) b
where a.tablespace_name = b.tablespace_name;

create tablespace tsi_hsps datafile :\oracle\product\10.2.0\oradata\orcl\tsi_hsps_1.dat' size 1g;

create tablespace dmusertbs
datafile 'i:\oracle\oradata\dmusertbs01.dbf' size 50m,
'i:\oracle\oradata\dmusertbs02.dbf' size 50m,
'i:\oracle\oradata\dmusertbs03.dbf' size 50m

5. 擴充套件表空間

alter tablespace tablespace_name

add datafile '表空間檔名' size 500m
autoextend on
next 50m
maxsize 2000m;
增加了乙個500m的資料檔案,並且可以自動擴充套件到2000m,每次擴充套件50m。

增加當前資料檔案的大小

alter database datafile '表空間檔案' resize 500m；

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