Problem writing a sql query

I am a Java Developer and new to database.
Database Table:
Table 'Authors' with fields 'Author'(Varchar2), 'Code'(Varchar2), 'Id'(Varchar2 ~ Not a primary key, multiple records can have same value) and 'Date_Sequence'(Number). The possible values for 'Code' could be either 'Yes' or 'No'.
Approach:
I can select a list of authors, say AYES AUTHORS with code 'Yes' and a list of authors, say NOES AUTHORS with code 'No' from my web page.
When I submit the request, I need to retrieve all the Id's, where AYES Authors voted 'Yes' and NOES Authors voted 'No'.
I have come up with the following query:
SELECT DISTINCT ID FROM AUTHORS WHERE AUTHOR IN ('my selected AYES list') AND CODE = 'Yes'
INTERSECT
SELECT DISTINCT ID FROM AUTHORS WHERE AUTHOR IN ('my selected NOES list') AND CODE = 'No'
Problem:
Now the problem here being, I have to retrieve the id's where the 'Date Sequence' is same for 'Yes' and 'No'. Not sure how to link the Date_Sequence for both the queries across the intersect clause. Any clue is highly appreciated.
Thanks.

Not sure if i understand what the logic behind it is, but try this..
WITH AUTHORS AS (SELECT 'AYES1' AUTHOR, 'Yes' CODE, '1' ID, TRUNC(SYSDATE) DATE_SEQ FROM DUAL
                 UNION ALL
                 SELECT 'AYES2' AUTHOR, 'Yes' CODE, '2' ID, TRUNC(SYSDATE)-1 DATE_SEQ FROM DUAL
                 UNION ALL
                 SELECT 'AYES3' AUTHOR, 'No' CODE, '3' ID, TRUNC(SYSDATE) DATE_SEQ FROM DUAL
                 UNION ALL
                 SELECT 'NOES1' AUTHOR, 'No' CODE, '1' ID, TRUNC(SYSDATE) DATE_SEQ FROM DUAL
                 UNION ALL
                 SELECT 'NOES2' AUTHOR, 'No' CODE, '2' ID, TRUNC(SYSDATE) DATE_SEQ FROM DUAL
SELECT AYES.ID, AYES.DATE_SEQ
FROM AUTHORS AYES,
       AUTHORS NOES
WHERE AYES.AUTHOR IN ('AYES1', 'AYES2', 'AYES3') AND AYES.CODE='Yes'
   AND NOES.AUTHOR IN ('NOES1', 'NOES2', 'NOES3') AND NOES.CODE='No'
   AND AYES.ID=NOES.ID
   AND AYES.DATE_SEQ=NOES.DATE_SEQ
ID         DATE_SEQ
1          22.10.08
SQL>

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try this [Not fully tested]
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BANNER
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PL/SQL Release 11.2.0.2.0 - Production
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