Oracle Database Discussions

I tried to create a range partition for each month and tried the following script , but it throws me error stating Missing Right Parenthesis . I have tried it in 10g and 11g both throws error .  This extract function works fine with timestamp , but when it is used inside range definition its throwing error . Could someone help me out ?

SQL> CREATE TABLE TST_PART

  2  (

  3    pid       NUMBER,

  4    trans_dt  TIMESTAMP(6)

  5  )

  6  PARTITION BY RANGE (extract(MONTH from TRANS_DT))

  7  (

  8    PARTITION P1 VALUES LESS THAN (2) TABLESPACE T1,

  9    PARTITION P2 VALUES LESS THAN (MAXVALUE) TABLESPACE T2

10  );

PARTITION BY RANGE (extract(MONTH from TRANS_DT))

                           *

ERROR at line 6:

ORA-00907: missing right parenthesis