How to Add, Resize, Drop and Rename of a datafile in Tablespace

                                       How to Add, Resize, Drop and Rename a datafile in Tablespace

In order to create a data file first, need to create a tablespace, To know how to create a tablespace Click here

To demonstrate, I will use USERS tablespace to Add,  Resize, Drop and Rename a data file.

 First, we can check how many data files are present under USERS tablespace through below command.

 Command: - select name from v$datafile;

We can see from above output only a single data file is present under USERS tablespace.

Addition of Datafile: -

Command to add a datafile: - alter tablespace users add datafile '/u01/app/oracle/oradata/prod/users02.dbf' size 50m;


The new data file has been added to my USERS tablespace.

Resize of a Datafile: -

Command to resize the datafile: - alter database datafile '/u01/app/oracle/oradata/prod/users02.dbf' resize 20m;


Renaming of a Datafile: -

We have a few steps to rename a data file: -

1) Take the tablespace offline.



2) From Host need to move the data of a file from a new file which we want to rename.



3) From SQL prompt need to alter the changes.



4) Take the tablespace online.


Deletion of datafile: -

Command to drop a datafile: - alter tablespace USERS drop datafile '/u01/app/oracle/oradata/prod/user03.dbf




Comments

Post a Comment

Popular posts from this blog

How to resolve "No protocol specified" error

Image
Error 1) [oracle@prod ~]$ dbca No protocol specified Error 2) [oracle@prod ~]$ netca Oracle Net Services Configuration: No protocol specified Error: null Check the trace file for details: /u01/app/oracle/cfgtoollogs/netca/trace_OraDb11g_home1-1901166PM3102.log Oracle Net Services configuration failed.  The exit code is 1 Solution Step 1) login as root user Step 2) run command xhost + this command allows you to use any graphical tool Example: - [root@prod Desktop]# xhost + access control disabled, clients can connect from any host Step 3) Now again run graphical tool utility command, that issue will get resolved now. [oracle@prod ~]$ dbca
Read more

How to do "Multiplexing of Control Files" through spfile ( server parameter file) in Oracle 11g

Image
Step 1)  To perform "Multiplexing of Control Files" through spfile ( server parameter file)" first we need to create spfile from pfile. Example to create spfile from pfile: -                                       Step 2) Copy the control files in physical location from 'cp' command. Note: - At present, I have 2 control files,  I will add one more Control files in the same location. Example: -  Now you can see from above output control04.ctl file has been physically added successfully under /u01/app/oracle/oradata/prod/control04.ctl location. Step 3)  Now you need to set the same through alter command. a)  first shut down the database                                          b)  Startup (Start the database through spfile)                                                                         Step 4) Now through SQL prompt alter the changes. Example: - Step 5) Now shutdown and start the database again and check
Read more