prob in retrieving

i have two tables named sec_mast and sec_detail

SQL> descr sec_mast;
Name Null? Type
----------------------------------------- -------- ------------
SEC_NO NOT NULL NUMBER(4)
CATG_CODE NUMBER(2)
FACE_VAL NOT NULL NUMBER(10,2)
PUR_VAL NOT NULL NUMBER(10,2)
INT_PAID NOT NULL NUMBER(8,2)
INT_RECD NOT NULL NUMBER(8,2)
BRKR NOT NULL NUMBER(8,2)
TOT_VAL NOT NULL NUMBER(12,2)
VOU_NO VARCHAR2(9)
VOU_DATE DATE
VOU_AMT NUMBER(15,2)
DUE_DATE1 NOT NULL DATE
DUE_DATE2 DATE
LF_NO NOT NULL VARCHAR2(10)
MAT_DATE NOT NULL DATE
FK_VOU_NO2 VARCHAR2(9)

SQL> descr sec_detail;
Name Null? Type
----------------------------------------- -------- ----------------
SEC_NO NUMBER(4)
LF_NO VARCHAR2(8)
DUE_DATE1 DATE
VOU_NO VARCHAR2(9)
VOU_DATE DATE
VOU_AMT NUMBER(15,2)
FK_VOU_NO1 VARCHAR2(9)


my problem is that i want to retrieve values from database and i have used following query for the prepared statement.Here VOU_No is foreign key.

select * from sec_detail,sec_mast where sec_detail.sec_no=sec_mast.sec_no //

if this query is wrong then plzz help me in this..

What happens when you run that query?