oracle 修改表空间语法(google找到的)

(windows 的oracle 的开始菜单里面有个"Enterprise Manager Console" , 在该工具里面可以直接编辑表空间及文件)

ALTER DATABASE

Open an existing database, and /or modify associated files.

Syntax:

ALTER DATABASE database_name options

Options:

open/mount options:
MOUNT
MOUNT STANDBY DATABASE
MOUNT CLONE DATABASE
MOUNT PARALLEL
MOUNT STANDBY DATABASE
CONVERT
OPEN [READ ONLY]
OPEN [READ WRITE] RESETLOGS|NORESETLOGS [MIGRATE]
ACTIVATE STANDBY DATABASE
[NATIONAL] CHARACTER SET char_set

archivelog options:
ARCHIVELOG
NOARCHIVELOG

backup and recovery options:
BACKUP CONTROLFILE TO 'filename' [REUSE]
BACKUP CONTROLFILE TO TRACE [RESETLOGS] [AS 'filename' [REUSE]]
CREATE STANDBY CONTROLFILE AS 'filename' [REUSE]
RECOVER recover_clause
RECOVER MANAGED STANDBY standby_recover_clause
END BACKUP

Datafile options:
CREATE DATAFILE 'filename' AS filespec
DATAFILE 'filename' ONLINE
DATAFILE 'filename' OFFLINE [DROP]
DATAFILE 'filename' RESIZE int K | M
DATAFILE 'filename' AUTOEXTEND OFF
DATAFILE 'filename' AUTOEXTEND ON [NEXT int K | M] [MAXSIZE int K | M | UNLIMITED]
DATAFILE 'filename' END BACKUP
RENAME FILE 'data_file_name' TO 'data_file_name'

TEMPFILE 'filename' ONLINE
TEMPFILE 'filename' OFFLINE
TEMPFILE 'filename' DROP [INCLUDING DATAFILES]
TEMPFILE 'filename' RESIZE int K | M
TEMPFILE 'filename' AUTOEXTEND OFF
TEMPFILE 'filename' AUTOEXTEND ON [NEXT int K | M] [MAXSIZE int K | M | UNLIMITED]

redo log options:
ADD LOGFILE [THREAD int] [GROUP int] filespec
ADD LOGFILE MEMBER 'filename' [REUSE] TO GROUP int
ADD LOGFILE MEMBER 'filename' [REUSE] TO 'filename'
DROP LOGFILE GROUP int
DROP LOGFILE ('filename')
DROP LOGFILE MEMBER 'filename'
RENAME FILE 'redolog_file_name' TO 'redolog_file_name'
CLEAR [UNARCHIVED] LOGFILE GROUP int [UNRECOVERABLE DATAFILE]
CLEAR [UNARCHIVED] LOGFILE ('filename') [UNRECOVERABLE DATAFILE]

Parallel server options:
CREATE STANDBY CONTROLFILE AS 'filename' [REUSE]
SET DBLOW = 'text'
SET DBHIGH = 'text'
SET DBMAC = ON | OFF
ENABLE [PUBLIC] THREAD int
DISABLE THREAD int

Backwards compatibility options:
RENAME GLOBAL_NAME TO database [domain]
RESET COMPATIBILITY

Any option above that includes a 'filename' can be extended to cover multiple files using the syntax: ('filename1', 'filename2')

'filename' [offline] DROP will only work on a tablespace consisting of a single datafile, for a tablespace comprising multiple datafiles you can only drop a datafile by dropping the entiretablespace.

Some of the commands above can only be used when the database is in a particular state:

MOUNT, CONVERT - Require that the db is Not Mounted.

ARCHIVELOG, NOARCHIVLOG, RECOVER - Require that the db is Mounted but not open (must be mount exclusive - not mount parallel).

ENABLE, DISABLE, RENAME GLOBAL_NAME, RESET, SET - Require that the db is Open.

All other options will work with the db mounted, open or closed as long as none of the files involved are 'in use'

database_name

is defined when the database is created - it is normally set to the same as the database SID.

Examples

Resize datafile:

SQL> ALTER DATABASE DATAFILE 'F:\oradata\live\Mydb02.ora' RESIZE 500m;

Take datafile offline:

SQL> ALTER DATABASE DATAFILE 'F:\oradata\live\Mydb02.ora' OFFLINE;

Database altered.

Take datafile online, when doing this, file recovery is needed to update the timestamp in the offline datafile header.:

SQL> ALTER DATABASE DATAFILE 'F:\oradata\live\Mydb02.ora' ONLINE;
ALTER DATABASE DATAFILE 'F:\oradata\live\Mydb02.ora' ONLINE
*
ERROR at line 1:
ORA-01113: file 16 needs media recovery
ORA-01110: data file 16: 'F:\ORADATA\LIVE\Mydb02.ORA'

SQL> RECOVER DATAFILE 'F:\oradata\live\Mydb02.ora';
Media recovery complete.

SQL> ALTER DATABASE DATAFILE 'F:\oradata\live\Mydb02.ora' ONLINE;

Database altered

Change the database character set to UTF8, this must be done with no users connected (restricted session)

SQL> SHUTDOWN IMMEDIATE;   -- or NORMAL
<do a full backup>
SQL> STARTUP MOUNT;
SQL> ALTER SYSTEM ENABLE RESTRICED SESSION;
SQL> ALTER SYSTEM SET JOB_QUEUE_PROCESSES=0;
SQL> ALTER DATABASE OPEN;
SQL> ALTER DATABASE CHARACTER SET UTF8;
SQL> SHUTDOWN IMMEDIATE;   -- or NORMAL
SQL> STARTUP;

"You know, the very powerful and the very stupid have one thing in common, they don't alter their views to fit the facts, they alter the facts to fit the views, which can be uncomfortable, if you happen to be one of the facts that needs altering."- Doctor
Who

Related Commands:

DATABASE - CREATE DATABASE

RECOVER

SHUTDOWN

STARTUP

ALTER TABLESPACE

ALTER SYSTEM

Related Views:

GLOBAL_NAME DBA_DATA_FILES V$CONTROLFILE V$DATABASE
V$DATAFILE V$LOG V$LOGFILE