Tbs_P1：创建、更改和删除表空间

SQL>conn system/oracle
SQL>CREATE TABLESPACE  tbs_peenboo
DATAFILE'/oradata/tbs_peenboo_01.dbf' size 10m
EXTENTMANAGEMENT LOCAL AUTOALLOCATE
SEGMENTSPACE MANAGEMENT AUTO;

SQL>create table  t_newtab(c1 date)tablespace tbs_peenboo;
SQL>select extent_id,bytes from dba_extents
Where  owner='system' and segment_name='T_NEWTAB';

SQL>ALTER TABLE t_newtab ALLOCATE  EXTENT;

SQL>ALTERTABLESPACE T_PEENBOO OFFLINE;
SQL>INSERT INTO T_NEWTAB VALUES (SYSDATE);
----ora-00376:file 6 cannot be read at this time
SQL>ALTER TABLESPACE T_PEENBOO ONLINE;
SQL>INSERT INTO T_NEWTAB VALUES (SYSDATE);
----1 rowcreated

SQL>alter tablespace tbs_peenboo read only;
SQL>INSERT INTO T_NEWTAB VALUES (SYSDATE);
----ora-00372: file 6 cannot be modified atthis time

SQL>droptable t_newtab;
----tabledropped;

SQL>alter tablespace tbs_peenboo read write;

----启用OMF来创建数据文件
SQL>alter system set db_create_file_dest = '/oradata';

--用最少的语法创建表空间
SQL>create tablespace tbs_omfnew;

--确定OMF文件的特性
SQL>selectfile_name,bytes, autoextensible,maxbytes,increment_by
Fromdba_data_files where tablespace_name ='TBS_OMFNEW';

--调整OMF 文件，使特性趋于合理。
SQL>alter database datafile
'/oradata/ORACLE11G/datefile/o1_mf_tbs_omfnew_3olpn462.dbf'
Resize500m;
SQL>alter database datafile
'/oradata/ORACLE11G/datefile/o1_mf_tbs_omfnew_3olpn462.dbf'
Autoextendon next 100m maxsize 2G;

--删除表空间
SQL>droptablespace tbs_omfnew including contents and datafiles;