oracle表空间相关的查询语句


		oracle表空间相关的查询语句
 
--合并表空间大小
alter tablespace users coalesce
 
--查询数据文件
select file_name,file_id from dba_data_files
 
--查询数据库对象占空间大小
select owner,segment_name,sum(bytes) from dba_extents where file_id=4 group by owner,segment_name order by sum(bytes) desc
 
select sum(bytes),tablespace_name from dba_free_space group by tablespace_name order by 1 desc
 
--修改数据文件大小
alter database datafile 'D:\ORACLE11GXE\APP\ORACLE\ORADATA\XE\USERS.DBF' resize 7000M;
 
--查询表空间利用率
select  s.tablespace_name,
       round(sum(s.bytes / 1024 / 1024), 2) as Space,
       round((sum(s.bytes / 1024 / 1024) - nvl(d.fr,0)), 2) used,
       nvl(round(d.fr, 2),0) free,
       decode(round(sum(s.maxbytes / 1024 / 1024 / 1024), 2),0,'NO','YES') auto_extend,
       round(sum(s.maxbytes / 1024 / 1024 / 1024), 2) MaximumGB
  from dba_data_files s,
       (select c.tablespace_name,
               round(sum(c.bytes / 1024 / 1024), 2) fr
          from dba_free_space c
         group by c.tablespace_name) d
 where s.tablespace_name = d.tablespace_name(+)
 group by s.tablespace_name,d.fr
 order by s.tablespace_name
 
 --查询表空间状态
 select file_id,file_name,tablespace_name,AUTOEXTENSIBLE  from dba_data_files;