oracle表空间

--查看表空间文件及大小 select tablespace_name "表空间名", file_name "文件名称", round(bytes / (1024 * 1024), 0) "表空间大小(m)" from dba_data_files order by tablespace_name, file_name;

--查看表空间使用状况

select a.tablespace_name "表空间名",

total "表空间大小",

   free "表空间剩余大小",

   (total - free) "表空间使用大小",

   total / (1024 * 1024 * 1024) "表空间大小(g)",

   free / (1024 * 1024 * 1024) "表空间剩余大小(g)",

   (total - free) / (1024 * 1024 * 1024) "表空间使用大小(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;

--修改表空间为自增加 alter database datafile 'd:\oracle\product\10.2.0\oradata\edwtest\app03.dbf' autoextend on next 5m maxsize 100m;

--增长表空间文件 alter tablespace users add datafile 'e:\oracle\product\10.2.0\oradata\orcl\users03.dbf' size 10240m;

alter tablespace users add datafile 'e:\oracle\product\10.2.0\oradata\orcl\users03.dbf' size 10240m autoextend on next 64m maxsize 512m;

--改变数据库文件大小 alter database datafile 'e:\oracle\product\10.2.0\oradata\orcl\users02.dbf' resize 10240m;