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  • Oracle 表空间

    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


    By Peter.zhang

    From:Peter's Blog                            

    MSN: peter.zhang@live.cn

    电子邮箱:peter.zhang@foxmail.com

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  • 原文地址:https://www.cnblogs.com/fromchaos/p/2219143.html
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