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  • 1. Sql>select tablespace_name, file_name from dba_data_files union select tablespace_name, file_namefrom dba_temp_files order by 1;To reduce character of the file_name,define_editor=vi, name permanently and sqlname:Sql>!$cd $ORACLE_HOME/sqlplus/admin/$vi glogin.sqlG (to go to last line)O (it gives u new line to write)define_editor=vicol file_name format a35col name format a30set sqlprompt "_USER@_CONNECT_IDENTIFIER>"Tablespace Management Practical’s:--Views:--V$sga, v$sgastat, v$sgainfoV$sysaux_occupantsDesc dba_tablespaces;Desc dba_data_files;Desc v$tablespace;Desc v$datafile;Desc v$database;From 8i onwards we can maintain tablespaces locally.1. To create locally managed tablespace:--create tablespace tname datafile ‘/path/*.dbf’ size 100M autoextend on;2. How to add datafile to existing tablespaces?alter tablespace tname add datafile ‘/path/*.dbf’ size 100M autoextend on;
  • 2. 3.how to drop a tablespace?Drop tablespace tname including contents and datafiles;4. How to drop a datafile?alter tablespace users drop datafile /data/oracle/dev/data/userdata1.dbf;To see tablespaces name and datafiles path?Select tablespace_name, file_name from dba_data_files;5. How to rename a tablespace?alter tablespace oldname rename to newname;6. How to see datafiles sizes?Select file_name, bytes/1024/1024 “size in MBs” from dba_data_files;7. How to see creation time of datafiles;Select name, creation_time from v$datafile;8.How to resize a datafile?Alter database datafile ‘/path/*.dbf’ resize 200M;How to drop tablespace without datafiles?Drop tablespace tablespacename;9.How to add orphan datafile to new tablespace?Create tablespace tname datafile ‘/path/*.dbf’ reuse;10. How to add one more orphan datafile to existing tablespace?Alter tablespace tname add datafile ‘/path/*.dbf’ reuse;11. How to rename the datafile;Alter tablespace tname offline;$mv ‘/path/oldname’ ‘/path/newname’12.We must give information to controlfile.Alter database rename file ‘/path/dfname.dbf’ to ‘/path/dfname.dbf’;
  • 3. alter tablespace tname online;13. How to create big file tablespace?Create bigfile tablespace big_ts datafile ‘/path/big_ts.dbf’ size 100M autoextend on;Temporary tablespace practical’s:--Views:--Desc dba_temp_files;Desc v$tempfile;Desc dba_tablespace_groups;select * from dba_tablespace_groups;Select file_name, file_id, status from dba_temp_files;Select name, file#, creation_time from v$tempfile;1. how to create temporary tablespace?Create temporary tablespace tempname tempfile ‘path/temp.dbf’ size 100M autoextend on;1.1 How to resize the temporary tempfile?Sql>alter database tempfile ‘/path/temp.dbf’ resize 100M;2. how to create tablespace group?select username, temporary_tablespace, default_tablespace from dba_users where username = TEMPUSER;Create temporary tablespace temp1 tempfile ‘/path/temp.dbf’ size 100M tablespace group tgrg;3. how to add existing temp file to group?Alter tablespace temp2 tablespace group tgrp;4. how to make temp group as default?Alter database default temporary tablespace tempgroup;5. how to drop a tablespace group? First we need to drop members;
  • 4. alter tablespace temp tablespace group tgrp;create new temporary tablespace:create temporary tablespace name tmepfile ‘/path/temp.dbf’ size 100M autoextend on;make it as default:alter database default temporary tablespace namenow drop the temporary group members:drop tablespace tempname including contents and datafiles;Undo tablespace management:--Show parameter undo;Desc v$undostat;Desc v$rollstat;We do have only one undo tablespace for one database. When we need more size we will create big oneand replace it.1. how to create new undo tablespace?Create undo tablespace undotbs2 datafile ‘/path/undo.dbf’ size 100M;How to change default undo tablespace?Alter system set undo_tablespace=’UNDOTBS’ scope=both;