『ORACLE』对永久表空间进行DML操作（11g）

Posted 2020-09-19 九號客栈

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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‘;