Group by and save County simplification, try #2

I know what I'm trying to do, don't know how to get there. I provided do it table and inserts as well as the query is not working.
/*table*/
CREATE TABLE claims_step_table (  
table_id       INTEGER PRIMARY KEY, 
record_id      NUMBER,  
step_code      VARCHAR2(20 Byte),
date_completed DATE,
step_date      DATE
)

/*inserts*/
INSERT INTO claims_step_table VALUES (1,  123456,'P96','10-JAN-09','05-JAN-09');
INSERT INTO claims_step_table VALUES (2,  123456,'L61',null,'05-JAN-09');
INSERT INTO claims_step_table VALUES (3,  67,'P96','10-MAR-08','05-MAR-08');
INSERT INTO claims_step_table VALUES (4,  67,'L61',null,'05-MAR-08');
INSERT INTO claims_step_table VALUES (5,  67,'U18',null,'05-MAR-08');
INSERT INTO claims_step_table VALUES (6,  67,'429',null,'05-MAR-08');
INSERT INTO claims_step_table VALUES (7,  9876,'L61',null,'05-FEB-08');
INSERT INTO claims_step_table VALUES (8,  9876,'429',null,'05-FEB-08');
INSERT INTO claims_step_table VALUES (9,  123456,'P96','10-AUG-07','05-JUN-07');
INSERT INTO claims_step_table VALUES (10, 123456,'L61',null,'05-JUN-07');
INSERT INTO claims_step_table VALUES (11, 123456,'U18',null,'05-JUN-07');
INSERT INTO claims_step_table VALUES (12, 123456,'429',null,'05-JUN-07');
INSERT INTO claims_step_table VALUES (13, 67555,'L61',null,'07-NOV-08');
INSERT INTO claims_step_table VALUES (14, 67555,'P96','08-NOV-08','07-NOV-08');
INSERT INTO claims_step_table VALUES (15, 67555,'429','15-NOV-08','07-NOV-08');
COMMIT;

/*query*/
SELECT
    RECORD_ID,
    max(STEP_DATE)
    from(
            select 
            RECORD_ID,
            STEP_DATE,
            case
                when STEP_CODE = 'L61' then DATE_COMPLETED
            end as STEP_L61,
            case
                when STEP_CODE = 'P96' then DATE_COMPLETED
            end as STEP_P96,
            case
                when STEP_CODE = 'U18' then DATE_COMPLETED
            end as STEP_U18,
            case
                when STEP_CODE = '429' then DATE_COMPLETED
            end as STEP_429
        from
        CLAIMS_STEP_TABLE
        where
            STEP_CODE in('L61','P96','U18','429')
    )
where
    STEP_L61 is null
and
    STEP_P96 is not null
and
    STEP_U18 is null
and
    STEP_429 is null

group by RECORD_ID, STEP_DATE
order by RECORD_ID, STEP_DATE DESC
What I need is all RECORD_ID and STEP_DATE where
• STEP_CODE L61, U18 and 429 the null value AND STEP_CODE P96 is over
• Only the more recent recordings based on the STEP_DATE (so the step_date max), if of multiple RECORD_ID.


The query should return * 2 * n - tuples
RECORD_ID       MAX(STEP_DATE)
67             03/05/2008
123456             01/05/2009
I am currently getting the following
RECORD_ID       MAX(STEP_DATE)
67             03/05/2008
67555             11/07/2008 <= step 429 not null
123456             01/05/2009
123456              06/05/2007 <= old record need newest
It is a much more simplified than the original query as it has several joins of tables. There are 100 records of k + in the real CLAIMS_STEP_TABLE with more than 1 different k STEP_CODE. (it is a fictitious table for this example). BTW on the real DB, I have only read access.

Thank you for your patience and understanding with a noob, hope this attempt is more clear.

The reason why it is failing because your pivot (inner query) is return few results:

 RECORD_ID STEP_DATE STEP_L61  STEP_P96  STEP_U18  STEP_429
---------- --------- --------- --------- --------- ---------
    123456 05-JAN-09           10-JAN-09
    123456 05-JAN-09
        67 05-MAR-08           10-MAR-08
        67 05-MAR-08
        67 05-MAR-08
        67 05-MAR-08
      9876 05-FEB-08
      9876 05-FEB-08
    123456 05-JUN-07           10-AUG-07
    123456 05-JUN-07
    123456 05-JUN-07
    123456 05-JUN-07
     67555 07-NOV-08
     67555 07-NOV-08           08-NOV-08
     67555 07-NOV-08                               15-NOV-08

So in the case of 67555, there is a situation where all the outer query conditions are met. What you need to do is to remove the extra NULL values as follows:

SELECT  RECORD_ID
,       STEP_DATE
,       MAX(CASE
                WHEN STEP_CODE = 'L61' THEN DATE_COMPLETED
        END) AS STEP_L61,
        MAX(CASE
                WHEN STEP_CODE = 'P96' THEN DATE_COMPLETED
        END) AS STEP_P96,
        MAX(CASE
                WHEN STEP_CODE = 'U18' THEN DATE_COMPLETED
        END) AS STEP_U18,
        MAX(CASE
                WHEN STEP_CODE = '429' THEN DATE_COMPLETED
        END) AS STEP_429
FROM    CLAIMS_STEP_TABLE
WHERE   STEP_CODE IN ('L61','P96','U18','429')
GROUP BY RECORD_ID
,       STEP_DATE

To achieve this result:

 RECORD_ID STEP_DATE STEP_L61  STEP_P96  STEP_U18  STEP_429
---------- --------- --------- --------- --------- ---------
     67555 07-NOV-08           08-NOV-08           15-NOV-08
      9876 05-FEB-08
    123456 05-JUN-07           10-AUG-07
        67 05-MAR-08           10-MAR-08
    123456 05-JAN-09           10-JAN-09

Then your entire query returns the following:

SQL> SELECT  RECORD_ID
  2  ,       MAX(STEP_DATE)
  3  FROM
  4  (
  5          SELECT  RECORD_ID
  6          ,       STEP_DATE
  7          ,       MAX(CASE
  8                          WHEN STEP_CODE = 'L61' THEN DATE_COMPLETED
  9                  END) AS STEP_L61,
 10                  MAX(CASE
 11                          WHEN STEP_CODE = 'P96' THEN DATE_COMPLETED
 12                  END) AS STEP_P96,
 13                  MAX(CASE
 14                          WHEN STEP_CODE = 'U18' THEN DATE_COMPLETED
 15                  END) AS STEP_U18,
 16                  MAX(CASE
 17                          WHEN STEP_CODE = '429' THEN DATE_COMPLETED
 18                  END) AS STEP_429
 19          FROM    CLAIMS_STEP_TABLE
 20          WHERE   STEP_CODE IN ('L61','P96','U18','429')
 21          GROUP BY RECORD_ID
 22          ,       STEP_DATE
 23  )
 24  WHERE   STEP_L61 IS NULL
 25  AND     STEP_P96 IS NOT NULL
 26  AND     STEP_U18 IS NULL
 27  AND     STEP_429 IS NULL
 28  GROUP BY RECORD_ID
 29  /

 RECORD_ID MAX(STEP_
---------- ---------
    123456 05-JAN-09
        67 05-MAR-08

SQL>

HTH!

Tags: Database

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