『ORACLE』 对永久表空间进行DML操作（11g）

SQL> create tablespace ts_users datafile 

  '/u01/app/oracle/oradata/enmo1/ts01.dbf' size 10m autoextend on maxsize 20m,

  '/u01/app/oracle/oradata/enmo1/ts01.bak.dbf' size 10m autoextend on maxsize 20m;
Tablespace created.
SQL> select tablespace_name,status from dba_tablespaces;
TABLESPACE_NAME           STATUS

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

SYSTEM                            ONLINE

SYSAUX                            ONLINE

UNDOTBS1                        ONLINE

TEMP                                ONLINE

USERS                              ONLINE

EXAMPLE                           ONLINE

TS_USERS                         ONLINE
7 rows selected.
增加数据文件
SQL> alter tablespace ts_users add datafile '/u01/app/oracle/oradata/enmo1/ts01.bak1.dbf' size 10M;
Tablespace altered.
SQL> select tablespace_name,file_id,file_name from dba_data_files where tablespace_name = 'TS_USERS';
TABLESPACE_NAME  FILE_ID  FILE_NAME

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

TS_USERS               6             /u01/app/oracle/oradata/enmo1/ts01.dbf
TS_USERS               7             /u01/app/oracle/oradata/enmo1/ts01.bak.dbf
TS_USERS               8             /u01/app/oracle/oradata/enmo1/ts01.bak1.dbf
修改数据文件大小
SQL> alter database datafile 8 resize 20M;
Database altered.
SQL> select file_id,bytes / 1024 / 1024 || 'M' from dba_data_files where tablespace_name = 'TS_USERS';
FILE_ID   BYTES/1024/1024||'M'

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

6            10M

7            10M

8            20M
SQL> select file_id,file_name,autoextensible,maxbytes from dba_data_files where tablespace_name = 'TS_USERS';
FILE_ID   FILE_NAME                                                       AUT              MAXBYTES

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

6             /u01/app/oracle/oradata/enmo1/ts01.dbf           YES               20971520
7             /u01/app/oracle/oradata/enmo1/ts01.bak.dbf     YES    
          20971520
8             /u01/app/oracle/oradata/enmo1/ts01.bak1.dbf    NO    
           0
SQL> alter database datafile 8 autoextend on next 5M maxsize unlimited;
Database altered.
SQL> select file_id,file_name,autoextensible,maxbytes from dba_data_files where tablespace_name = 'TS_USERS';
FILE_ID   FILE_NAME                       AUT MAXBYTES

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

6            /u01/app/oracle/oradata/e YES 20971520

              nmo1/ts01.dbf
7            /u01/app/oracle/oradata/e YES 20971520

              nmo1/ts01.bak.dbf
8            /u01/app/oracle/oradata/e YES 3.4360E+10

              nmo1/ts01.bak1.dbf 　　
删除表空间
SQL> drop tablespace TS_USERS including contents and datafiles;
Tablespace dropped.
SQL> select tablespace_name,file_id,file_name 

2 from dba_data_files where tablespace_name = 'TS_USERS';
no rows selected