How To Create a New Tablespace?

by **Micheal** Tue Jan 19, 2010 7:15 pm

If you want a new dataspace, you can use the CREATE TABLESPACE ... DATAFILE statement
as shown in the following script:
SQL> CREATE TABLESPACE my_space
2 DATAFILE '/temp/my_space.dbf' SIZE 10M;
Tablespace created.
SQL> SELECT TABLESPACE_NAME, STATUS, CONTENTS FROM USER_TABLESPACES;
TABLESPACE_NAME STATUS CONTENTS
---------------- --------------- ---------
SYSTEM ONLINE PERMANENT
UNDO ONLINE UNDO
SYSAUX ONLINE PERMANENT
TEMP ONLINE TEMPORARY
USERS ONLINE PERMANENT
MY_SPACE ONLINE PERMANENT
SQL> SELECT TABLESPACE_NAME, FILE_NAME, BYTES FROM DBA_DATA_FILES;
TABLESPACE_NAME FILE_NAME BYTES
---------------- ---------------------------------- ----------
USERS \ORACLEXE\ORADATA\XE\USERS.DBF 104857600
SYSAUX \ORACLEXE\ORADATA\XE\SYSAUX.DBF 461373440
UNDO \ORACLEXE\ORADATA\XE\UNDO.DBF 94371840
SYSTEM \ORACLEXE\ORADATA\XE\SYSTEM.DBF 356515840
MY_SPACE \TEMP\MY_SPACE.DBF 10485760
So one statement created two structures: a tablespace and a data file. If you check your file
system with Windows file explorer, you will see the data file is located in the \temp directory of.
The data file size is about 10MB. Its contents should be blank and full of \x00 at this time.