Re: how to shrink data file

From: Michel Cadot <micadot_at_netcourrier.com>
Date: Fri, 2 Feb 2001 09:30:49 +0100
Message-ID: <95dr7q$t0$1@s1.read.news.oleane.net>

You can't resize the file below the last allocated block. You can find the minimum size with a query like the following:

select substr(f.file_name,1,70) "Filename",

max(e.block_id*(e.bytes/e.blocks)+e.bytes)/1024 "MinSize (Kb)" from dba_extents e, dba_data_files f
where e.file_id = f.file_id
group by f.file_name
/

--
Have a nice day
Michel


"zhang liang" <novazl_at_263.net> a écrit dans le message news: 95avs7$1n6p$1_at_news.cz.js.cn...


> After checking dba_free_space, I found that "system" tablespace has 1.67G

> free bytes. Since the data file for "system" tablespace is about 2.1G, I try

> to use the following command to resize file system01.rbf to about 800M:

>

> alter database datafile '/oracle/u01/oradata/wapdb/system01.rbf' resize

> 800M;

>

> But the following error message was returned:

>

> ORA-03297: file contains used data beyond requested RESIZE value

>

>

> The same kind of error also occurs when I try to shrink file "rbs01.dbf",

> which holds tablespace "rbs".

>

>

>

>

>

Received on Fri Feb 02 2001 - 02:30:49 CST