Creating an ‘Undo’ tablespace

a) Using SQL Plus:

1. Type the following command on the SQL prompt (figure 5):

CREATE SMALLFILE UNDO TABLESPACE "TESTTBLSPCE" DATAFILE 'C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL\testfl' SIZE 100M;

Figure -5 Creating Undo Tablespace using SQL Plus

b) Using iSQL Plus:

1. On the ‘Workspace’ tab (figure 6), enter the following command:

CREATE SMALLFILE UNDO TABLESPACE "TESTTBLSP" DATAFILE 'C:\ORACLE\PRODUCT\10.1.0\ORADATA\ORCL\testfl' SIZE 100M

Figure -6 Creating Undo Tablespace using iSQL Plus

c) Using Enterprise Manager :

Undo tablespaces are special tablespaces used solely for storing undo information. You cannot create any other segment types in undo tablespaces. For more details on offline tablespaces, refer to the section ‘Creating Tablespaces using Enterprise Manager > Type’

An undo tablespace can be created by following the steps given in the section ‘Creating Tablespaces using Enterprise Manager’ and selecting the ‘Undo’ option under the ‘Type’ region (figure 12).

Renaming a Tablespace

a) Using SQL Plus:

1. Type the following command on the SQL prompt (figure 7):
ALTER TABLESPACE "TESTTBLSPCE" RENAME TO "TESTTBLSPEC";

Figure -7 Renaming Tablespace using SQL Plus

b) Using iSQL Plus:

1. On the ‘Workspace’ tab (figure 8), enter the following command:
ALTER TABLESPACE "TESTTBLSPC" RENAME TO "TESTTBLSPEC"

Figure -8 Renaming Tablespace using iSQL Plus

c) Using Enterprise Manager :

To rename an existing tablespace,

1. Navigate to ‘Administration > Tablespaces’ in Enterprise Manager.
2. Enter the name of the tablespace that you want to rename and click ‘Go’ (figure 15).
3. In the ‘Results’ region, select the tablespace name and click ‘Edit’ (figure 15).
4. Enter a new name for the tablespace in the ‘Name’ field.
5. Click ‘Apply’ to modify the availability for the selected tablespace.

Note: You can rename only tablespaces from databases with a version number greater than 10g.

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