oracle表空间的创建容量查询及扩容

l 建立表空间

create tablespace kaoyi_cq

logging

datafile 'E:\app\xuwei\oradata\orcl\KAOYI_cq.DBF'  --这里是物理表空间文件的物理路径

size 1024m

autoextend on

next 100m maxsize unlimited

extent management local;

l 查看表空间剩余容量

² 以sys或dba权限用户登录

主要从数据库的表dba_data_files,dba_segments两张表中获取。默认数据库保存的是byte单位，转换关系如下:

1024bytes = 1kb

1024KB = 1M

1024M = 1G

² 视图脚本

CREATE OR REPLACE VIEW V_GET_DISKSPACE AS

 SELECT A.TABLESPACE_NAME,

 A.USE "USED (MB)",

 (B.TOTAL-A.USE) "FREE (MB)",

 B.TOTAL "TOTAL (MB)",

 round((B.TOTAL-A.USE)/B.TOTAL,5)*100||'%' "PER_FREE"

 FROM

 (

 select TABLESPACE_NAME,sum(bytes)/(1024*1024) as USE from dba_segments

 /*where tablespace_name NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')*/

 GROUP BY TABLESPACE_NAME

 ) A ,

 (

 WITH TABLESPACE_TOTAL AS

 (

 SELECT tablespace_name,sum(MAXBYTES)/(1024*1024) TOTAL FROM DBA_DATA_FILES T

 WHERE /*T.TABLESPACE_NAME NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')

 AND*/ T.AUTOEXTENSIBLE='YES' group by tablespace_name

 UNION ALL

 SELECT tablespace_name,sum(bytes) TOTAL FROM DBA_DATA_FILES T

 WHERE /*T.TABLESPACE_NAME NOT IN ('USERS','SYSAUX','UNDOTBS1','SYSTEM','UNDOTBS2')

 AND*/ T.AUTOEXTENSIBLE='NO' group by tablespace_name

 )

 SELECT TABLESPACE_NAME,SUM(TOTAL) TOTAL FROM TABLESPACE_TOTAL GROUP BY TABLESPACE_NAME

 ) B

 WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME;

² 在视图表中查看结果

 

l 扩充表空间

² 查询表空间在物理磁盘上的位置

SELECT tablespace_name,

file_id,

file_name,

round(bytes / (1024 * 1024), 0) total_space

FROM dba_data_files

ORDER BY tablespace_name;

 

² 给需要扩充的表空间进行扩容操作

alter tablespace kaoyi

add datafile 'E:\APP\XUWEI\ORADATA\ORCL\KAOYI0211.DBF' size 5m autoextend on;