PL/SQL :: Find The Duplicate Data In Tables 11g

i want to find the duplicate data in my tables i have the below structure

SQL> desc x;
Name                                      Null?    Type
----------------------------------------- -------- ----------------------------
FILE_CODE                                          NUMBER(20)
STREAMNUMBER                                       VARCHAR2(50)
SERVICEKEY                                         VARCHAR2(50)
CALLINGPARTYNUMBER                                 VARCHAR2(50)
CALLEDPARTYNUMBER                                  VARCHAR2(50)
CHARGEPARTYINDICATOR                               VARCHAR2(50)

[Code] ......

i found the below query it's right

SELECT * x
WHERE ROWID NOT IN (SELECT MIN(ROWID) FROM x
GROUP by FILE_CODE,..........................,SEQ_NO ); all the column