sql>alter table table_name move tablespace same_tabelspace_as_before;

SELECT table_name,tablespace_name
FROM user_tables
WHERE table_name = <your table name>;

SQL> create table faq
  2  as
  3  select rownum id
  4  ,      obj.*
  5  from   (select * from all_objects
  6          union all
  7          select * from all_objects
  8          union all
  9          select * from all_objects
 10          union all
 11          select * from all_objects
 12          union all
 13          select * from all_objects
 14         ) obj
 15  /

Table created.

Elapsed: 00:00:15.35
SQL> alter table faq add constraint faq_pk
  2  primary key (id)
  3  /

Table altered.

Elapsed: 00:00:00.40
SQL> exec dbms_stats.gather_table_stats(user, 'FAQ', cascade => true);

PL/SQL procedure successfully completed.

Elapsed: 00:00:00.61
SQL>
SQL> set timing on
SQL>
SQL> select count(*)
  2  from   faq;

  COUNT(*)
----------
     67235

Elapsed: 00:00:00.01
SQL>
SQL> delete faq where rownum <= 67000
  2  /

67000 rows deleted.

Elapsed: 00:00:03.46
SQL> exec dbms_stats.gather_table_stats(user, 'FAQ', cascade => true);

PL/SQL procedure successfully completed.

Elapsed: 00:00:00.36
SQL>
SQL> select count(*)
  2  from   faq;

  COUNT(*)
----------
       235

Elapsed: 00:00:00.01