Creating a flatfile for muli- date table

Question

I am creating a flatfile for reporting purposes. The ASSESSMENT tables can have up to two assessment_date, assessment_type_code per transaction_ID
ie ASSESSMENT
Record 1
TRANSACTION_ID = 1234
ASSESSMENT_TYPE_CODE = 'ABC;
ASSESSMENT_DATE = 01/06/2006;
Record 2
TRANSACTION_ID = 1234
ASSESSMENT_TYPE_CODE = 'BBC;
ASSESSMENT_DATE = 17/06/2006;
How do I change this update statement to store both records in the flatfile.
UPDATE FLATFILE2003
SET
ASSESSMENT_TYPE_CODE_1 = (SELECT ASSESSMENT_TYPE_CODE FROM ASSESSMENT F WHERE FLATFILE2003.TRANSACTION_ID = F.TRANSACTION_ID AND ?),
ASSESSMENT_DATE_1 = (SELECT ASSESSMENT_DATE FROM ASSESSMENT F WHERE FLATFILE2003.TRANSACTION_ID = F.TRANSACTION_ID AND ?),
ASSESSMENT_TYPE_CODE_2 = (SELECT ASSESSMENT_TYPE_CODE FROM ASSESSMENT F WHERE FLATFILE2003.TRANSACTION_ID = F.TRANSACTION_ID AND ?),
ASSESSMENT_DATE_2 = (SELECT ASSESSMENT_DATE FROM ASSESSMENT F WHERE FLATFILE2003.TRANSACTION_ID = F.TRANSACTION_ID AND ?)
Thanks
Brendon

Answer 1

Do you mean something like this?
WITH rec1 AS (SELECT 1234  TRANSACTION_ID,
                     'ABC' ASSESSMENT_TYPE_CODE,
                     TO_DATE('01/06/2006', 'dd/mm/yyyy') ASSESSMENT_DATE
                FROM dual
               UNION
              SELECT 1235  TRANSACTION_ID,
                     'ABC' ASSESSMENT_TYPE_CODE,
                     TO_DATE('01/06/2006', 'dd/mm/yyyy') ASSESSMENT_DATE
                FROM dual),
     rec2 AS (SELECT 1234  TRANSACTION_ID,
                     'BBC' ASSESSMENT_TYPE_CODE,
                     TO_DATE('17/06/2006', 'dd/mm/yyyy') ASSESSMENT_DATE
                FROM dual
               UNION
              SELECT 1236  TRANSACTION_ID,
                     'BBC' ASSESSMENT_TYPE_CODE,
                     TO_DATE('17/06/2006', 'dd/mm/yyyy') ASSESSMENT_DATE
                FROM dual)
SELECT rec1.transaction_id       transaction_id,
       rec1.assessment_type_code assessment_type_code_1,
       rec1.assessment_date      assessment_date_1,
       rec2.assessment_type_code assessment_type_code_2,
       rec2.assessment_date      assessment_date_2
  FROM rec1, rec2
WHERE rec1.transaction_id = rec2.transaction_id
UNION ALL
SELECT rec1.transaction_id       transaction_id,
       rec1.assessment_type_code assessment_type_code_1,
       rec1.assessment_date      assessment_date_1,
       rec2.assessment_type_code assessment_type_code_2,
       rec2.assessment_date      assessment_date_2
  FROM rec1, rec2
WHERE rec1.transaction_id = rec2.transaction_id(+)
   AND rec2.transaction_id IS NULL
UNION ALL
SELECT rec2.transaction_id       transaction_id,
       rec1.assessment_type_code assessment_type_code_1,
       rec1.assessment_date      assessment_date_1,
       rec2.assessment_type_code assessment_type_code_2,
       rec2.assessment_date      assessment_date_2
  FROM rec1, rec2
WHERE rec1.transaction_id(+) = rec2.transaction_id
   AND rec1.transaction_id IS NULL
;C.