How to truncate or delete rows from audit trail table sys.aud$
1)Only appropriate privileged user can do delete operation on SYS.AUD$ table. The user must have either of the following privileges.
-SYS user.
-DELETE ANY TABLE system privilege. (If O7_DICTIONARY_ACCESSIBILITY=TRUE)
-A user to whom SYS has granted the object privilege DELETE on SYS.AUD$ table.
2)Before deleting any rows you may want to archive the table. You can achive this by creating a table from SYS.AUD$ and export that. Don't export SYS.AUD$ directly.
SQL>CREATE TABLE AUDIT_RECORD TABLESPACE users as select * from SYS.AUD$;
Now export the table as,
SQL> host exp tables=AUDIT_RECORD file=audit_record.dmp
3)To delete all records from audit trail table SYS.AUD$ issue,
SQL>DELETE FROM SYS.AUD$;
To delete all records of particular audited table from the audit trail issue,
SQL>DELETE FROM sys.aud$ WHERE obj$name='&table_nmae';
But deleting in this way will not reduce size on the system tablespace or aud$ table. In order to reduce size follow section 4.
4)Truncate audit table to reduce size.
SQL>CONN / as sysdba
SQL>TRUNCATE TABLE SYS.AUD$
oracle表空间操作详解
作者： 来源： 更新日期：2006-01-04
建立表空间
CREATE TABLESPACE data01
DATAFILE '/oracle/oradata/db/DATA01.dbf' SIZE 500M
UNIFORM SIZE 128k; #指定区尺寸为128k,如不指定，区尺寸默认为64k
删除表空间
DROP TABLESPACE data01 INCLUDING CONTENTS AND DATAFILES;
修改表空间大小
alter database datafile '/path/NADDate05.dbf' resize 100M
移动表至另一表空间
alter table move tablespace room1;
一、建立表空间
CREATE TABLESPACE data01
DATAFILE '/oracle/oradata/db/DATA01.dbf' SIZE 500M
UNIFORM SIZE 128k; #指定区尺寸为128k,如不指定，区尺寸默认为64k
二、建立UNDO表空间
CREATE UNDO TABLESPACE UNDOTBS02
DATAFILE '/oracle/oradata/db/UNDOTBS02.dbf' SIZE 50M
#注意：在OPEN状态下某些时刻只能用一个UNDO表空间，如果要用新建的表空间，必须切换到该表空间:
ALTER SYSTEM SET undo_tablespace=UNDOTBS02;
三、建立临时表空间
CREATE TEMPORARY TABLESPACE temp_data
TEMPFILE '/oracle/oradata/db/TEMP_DATA.dbf' SIZE 50M
四、改变表空间状态
1.使表空间脱机
ALTER TABLESPACE game OFFLINE;
如果是意外删除了数据文件，则必须带有RECOVER选项
ALTER TABLESPACE game OFFLINE FOR RECOVER;
2.使表空间联机
ALTER TABLESPACE game ONLINE;
3.使数据文件脱机
ALTER DATABASE DATAFILE 3 OFFLINE;
4.使数据文件联机
ALTER DATABASE DATAFILE 3 ONLINE;
5.使表空间只读
ALTER TABLESPACE game READ ONLY;
6.使表空间可读写
ALTER TABLESPACE game READ WRITE;
五、删除表空间
DROP TABLESPACE data01 INCLUDING CONTENTS AND DATAFILES;
六、扩展表空间
首先查看表空间的名字和所属文件
select tablespace_name, file_id, file_name,
round(bytes/(1024*1024),0) total_space
from dba_data_files
order by tablespace_name;
1.增加数据文件
ALTER TABLESPACE game
ADD DATAFILE '/oracle/oradata/db/GAME02.dbf' SIZE 1000M;
2.手动增加数据文件尺寸
ALTER DATABASE DATAFILE '/oracle/oradata/db/GAME.dbf'
RESIZE 4000M;
3.设定数据文件自动扩展
ALTER DATABASE DATAFILE '/oracle/oradata/db/GAME.dbf
AUTOEXTEND ON NEXT 100M
MAXSIZE 10000M;
设定后查看表空间信息
SELECT A.TABLESPACE_NAME,A.BYTES TOTAL,B.BYTES USED, C.BYTES FREE,
(B.BYTES*100)/A.BYTES "% USED",(C.BYTES*100)/A.BYTES "% FREE"
FROM SYS.SM$TS_AVAIL A,SYS.SM$TS_USED B,SYS.SM$TS_FREE C
WHERE A.TABLESPACE_NAME=B.TABLESPACE_NAME AND A.TABLESPACE_NAME=C.TABLESPACE_NAME;