Oracle 查看和扩展表空间

一、查询表空间使用情况

select a.tablespace_name as "表空间名",
a.bytes / 1024 / 1024 as "表空间大小(M)",
(a.bytes - b.bytes) / 1024 / 1024 as "已使用空间(M)",
b.bytes / 1024 / 1024 "空闲空间(M)",
round(((a.bytes - b.bytes) / a.bytes) * 100, 2) "使用比"
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;

二、扩展表空间

select tablespace_name,
file_id,
file_name,
round(bytes / (1024 * 1024), 0) total_space
from dba_data_files
order by tablespace_name

alter database datafile 'F:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\xxx.DBF' resize 1024m;

alter tablespace 表空间名称 add datafile 'F:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\new_xxx.DBF' size 500m

ALTER DATABASE DATAFILE 'xxx\xxx.dbf' AUTOEXTEND ON;//打开自动增长
ALTER DATABASE DATAFILE 'xxx\xxx.dbf' AUTOEXTEND ON NEXT 200M ;//每次自动增长200m
ALTER DATABASE DATAFILE 'xxx\xxx.dbf' AUTOEXTEND ON NEXT 200M MAXSIZE 1024M;//每次自动增长200m，表空间最大不超过1G