1、手工改變數據文件的大小
SQL>conn / as sysdba
SQL>Createtablespace exampletb Datafile 'E:\ examp01.dbf' size 10M ;
SQL>alter database datafile 'E:\examp01.dbf' resize 20m;
SQL>alter database datafile 'E:\examp01.dbf' resize 9m;
2、添加數據文件到表空間
SQL> alter tablespace exampletb add datafile 'E:\ examp02.dbf' size 10M;
3、從表空間中刪除數據文件
SQL> alter tablespace exampletb drop datafile 'E:\ examp02.dbf';
4、將表空間設置為只讀模式和讀寫模式
SQL>CREATETABLE scott.student (id NUMBER(5), name VARCHAR2(10)) TABLESPACE exampletb;
SQL>insertinto scott.student(id,name) values(1, 'lucy');
SQL> alter tablespace exampletb read only;
SQL>insertinto scott.student(id,name) values(2, 'lily');
SQL>select* from scott.student;
SQL> alter tablespace exampletb read write;
SQL>insertinto scott.student(id,name) values(2, 'lily');
5、 將表空間設置為在線和離線
SQL> alter tablespace exampletb offline;
SQL>select* from scott.student;
SQL> alter tablespace exampletb online;
SQL>select* from scott.student;
6、查詢表空間和數據文件
SQL>select * from v$tablespace;
SQL>select * from dba_tablespaces;
SQL>select * from v$datafile;
SQL> select * from dba_data_files;