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oracle表空间 Oracle10g学习系列(10)

表空间的四种状态:online,offline,read write和ready only

SQL> select file#,status,enabled from v$datafile;


 FILE#     STATUS                ENABLED

 --------  ---------           -------------

      1    SYSTEM                READ WRITE

      2    ONLINE                READ WRITE

      3    ONLINE                READ WRITE

      4    ONLINE                READ WRITE

      5    ONLINE                READ WRITE


users表空间状态改变:

SQL>alter tablespace users offline;

SQL>alter tablespace users online;

SQL>alter tablespace users read write;

SQL>alter tablespace users read only;


创建表空间:

SQL>create tablespace tb01 datafile ‘/u01/oracle/oradata/orcl/tb01.dbf‘ size 10m autoextent on;


表空间重命名:

SQL>alter tablespace tb01 rename to tb02;


表空间自动扩张,AUTOEXTENSIBLE自动扩张字段:

SQL> select tablespace_name,file_name,autoextensible from dba_data_files;

SQL> select tablespace_name,file_name,autoextensible from dba_data_files;

TABLESPACE_NAME                FILE_NAME                                AUTOEXTENSIBLE

------------------------ -------------------------                      --------------

USERS                   /home/oracle/oradata/orcl/users01.dbf                    YES

SYSAUX                 /home/oracle/oradata/orcl/sysaux01.dbf                     YES

UNDOTBS1              /home/oracle/oradata/orcl/undotbs01.dbf                    YES

SYSTEM                /home/oracle/oradata/orcl/system01.dbf                    YES

EXAMPLE               /home/oracle/oradata/orcl/example01.dbf                   YES


SQL> select file#,name from v$datafile;

FILE#     NAME

------- ----------------------------------------

1        /home/oracle/oradata/orcl/system01.dbf

2        /home/oracle/oradata/orcl/undotbs01.dbf

3       /home/oracle/oradata/orcl/sysaux01.dbf

4       /home/oracle/oradata/orcl/users01.dbf

5      /home/oracle/oradata/orcl/example01.dbf


SQL>alter database datafile 6 resize autoextend on;

SQL>alter tablespace tb01 add datafile ‘/u01/oracle/oradata/orcl/tb01.dbf‘ size 30m autoextent on;


表空间文件重命名:

前提是数据库是归档模式,数据库处于mount或者open模式,open模式的时候,表空间要offline,最后把表空间online:

SQL>alter tablespace tb01 offline;

SQL>ho cp /u01/oracle/oradata/orcl/tb01.dbf /u01/oracle/oradata/orcl/tb02.dbf

SQL>alter tablespace  rename datafile ‘/u01/oracle/oradata/orcl/tb01.dbf‘ to ‘/u01/oracle/oradata/orcl/tb02.dbf‘;

SQL>alter tablespace tb01 online;

需要介质恢复的话:

SQL>recover tablespace tb01;


删除表空间:

SQL>drop tablespace tb01 including contents and datafiles; 


查看表空间:

SQL> select tablespace_name from dba_data_files;

TABLESPACE_NAME

----------------

USERS

SYSAUX

UNDOTBS1

SYSTEM

EXAMPLE


SQL> select name from v$tablespace;

NAME

----------------

SYSTEM

UNDOTBS1

SYSAUX

USERS

TEMP

EXAMPLE


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oracle表空间 Oracle10g学习系列(10)