SQL>
SQL> select default_tablespace
2 from user_users;
DEFAULT_TABLESPACE
------------------------------
SYSTEM
SQL> create table foo (
2 a int );
Table created.
SQL>
SQL> select table_name, tablespace_name
2 from user_tables
3 where table_name = 'FOO';
TABLE_NAME TABLESPACE_NAME
------------------------------ ------------------------------
FOO SYSTEM
SQL> drop table foo;
Table dropped.
SQL>
SQL> create table foo (
2 a int )
3 tablespace users;
Table created.
SQL>
SQL> select table_name, tablespace_name
2 from user_tables
3 where table_name = 'FOO';
TABLE_NAME TABLESPACE_NAME
------------------------------ ------------------------------
FOO USERS
SQL> drop table foo;
Table dropped.