Help with Finding Duplicate records Query

Question

HI,
I am trying to write a query that will find duplicate records/cases.
This query will be used in a report.
So, here are the requirements:
I need to find duplicate cases/records based on the following fields:
DOB, DOCKET, SENT_DATEI was able to do that with the following query. The query below is able to give me all duplicate records based on the Criteria above
SELECT      DEF.BIRTH_DATE DOB,
           S.DOCKET DOCKET,
           S.SENT_VIO_DATE SENT_DATE, COUNT(*)
FROM SENTENCES S,
            DEFENDANTS DEF
WHERE      S.DEF_ID = DEF.DEF_ID
AND       S.CASE_TYPE_CODE = 10
GROUP BY  DEF.BIRTH_DATE, S.DOCKET, S.SENT_VIO_DATE
HAVING COUNT(*) > 1;
//I AM GOING TO CALL THIS QUERY 'X'Now, the information to be displayed on the report: defendants Name, DOB, District, Docket, Def Num, Sent Date, and PACTS Num if possible.
The problem that I need help on is how to combine those queries together (what I mean is a sub query). the 'X' query returns multiple values. please have a look at the comments on the query below to see what I'm trying to achieve.
here is the main query:
SELECT      INITCAP(DEF.LAST_NAME) || ' ' || INITCAP(DEF.FIRST_NAME) || ' ' || INITCAP(DEF.MIDDLE_NAME) DEFENDANT_NAME,
        DEF.BIRTH_DATE DOB,
        TRIM(DIST.DISTRICT_NAME) DISTRICT_NAME,
        S.DOCKET DOCKET,
        S.DEF_NUM DEF_NUM,
        S.SENT_VIO_DATE SENT_DATE,
        DEF.PACTS_ID PACTS_NUM
FROM      USSC_CASES.DEFENDANTS DEF,
        USSC_CASES.SENTENCES S,
        LOOKUP.DISTRICTS DIST
WHERE      DEF.DEF_ID = S.DEF_ID
AND      S.DIST_ID = DIST.USSC_DISTRICT_ID
AND     S.CASE_TYPE_CODE = 10
AND     S.USSC_ID IS NOT NULL
AND // what i'm trying to do is: DOB, DOCKET, SENT_DATE IN ('X' QUERY), is this possible ??
ORDER BY DEFENDANT_NAME; thanks in advance.
I am using Oracle 11g, and sql developer.
if my approach doesn't work, is there a better approach ?
Edited by: Rooney on Jul 11, 2012 3:50 PM

Answer 1

If I got it right, you want to join table USSC_CASES.DEFENDANTS to duplicate rows in USSC_CASES. If so:
SELECT  INITCAP(DEF.LAST_NAME) || ' ' || INITCAP(DEF.FIRST_NAME) || ' ' || INITCAP(DEF.MIDDLE_NAME) DEFENDANT_NAME,
        DEF.BIRTH_DATE DOB,
        TRIM(DIST.DISTRICT_NAME) DISTRICT_NAME,
        S.DOCKET DOCKET,
        S.DEF_NUM DEF_NUM,
        S.SENT_VIO_DATE SENT_DATE,
        DEF.PACTS_ID PACTS_NUM
  FROM  USSC_CASES.DEFENDANTS DEF,
         SELECT  *
           FROM  (
                  SELECT  S.*,
                          COUNT(*) OVER(PARTITION BY DEF.BIRTH_DATE, S.DOCKET, S.SENT_VIO_DATE) CNT
                    FROM  USSC_CASES.SENTENCES S
           WHERE CNT > 1
        ) S,
        LOOKUP.DISTRICTS DIST
  WHERE DEF.DEF_ID = S.DEF_ID
   AND  S.DIST_ID = DIST.USSC_DISTRICT_ID
   AND  S.CASE_TYPE_CODE = 10
   AND  S.USSC_ID IS NOT NULL
  ORDER BY DEFENDANT_NAME;If you want to exclude duplicates from the query and do not care which row out of duplicate rows to choose:
SELECT  INITCAP(DEF.LAST_NAME) || ' ' || INITCAP(DEF.FIRST_NAME) || ' ' || INITCAP(DEF.MIDDLE_NAME) DEFENDANT_NAME,
        DEF.BIRTH_DATE DOB,
        TRIM(DIST.DISTRICT_NAME) DISTRICT_NAME,
        S.DOCKET DOCKET,
        S.DEF_NUM DEF_NUM,
        S.SENT_VIO_DATE SENT_DATE,
        DEF.PACTS_ID PACTS_NUM
  FROM  USSC_CASES.DEFENDANTS DEF,
         SELECT  *
           FROM  (
                  SELECT  S.*,
                          ROW_NUMBER() OVER(PARTITION BY DEF.BIRTH_DATE, S.DOCKET, S.SENT_VIO_DATE ORDER BY 1) RN
                    FROM  USSC_CASES.SENTENCES S
           WHERE RN = 1
        ) S,
        LOOKUP.DISTRICTS DIST
  WHERE DEF.DEF_ID = S.DEF_ID
   AND  S.DIST_ID = DIST.USSC_DISTRICT_ID
   AND  S.CASE_TYPE_CODE = 10
   AND  S.USSC_ID IS NOT NULL
  ORDER BY DEFENDANT_NAME;SY.