oracle表空间相关的查询语句
--合并表空间大小
alter tablespace users coalesce
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--查询数据文件
select file_name,file_id from dba_data_files
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--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
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select sum(bytes),tablespace_name from dba_free_space group by tablespace_name order by 1 desc
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--修改数据文件大小
alter database datafile 'D:\ORACLE11GXE\APP\ORACLE\ORADATA\XE\USERS.DBF' resize 7000M;
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--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;
