Issue with Case Statment Bit Urgent.

Question

Hi Friends,
I am using a Case in my select statment but problem is i have used group by clause.
This is the main query.
SELECT   papf.employee_number OHR,
           papf.business_group_id,
           (CASE
               WHEN (paaf.effective_start_date = Min("paaf.effective_start_date" From Below Where condition))
               THEN
                  TO_CHAR (
                     (SELECT   ORIGINAL_DATE_OF_HIRE
                        FROM   apps.per_all_people_f p1
                       WHERE   p1.employee_number = papf.employee_number
                               AND p1.current_employee_flag = 'Y'),
                     'DD-MON-YYYY'
               ELSE
                  TO_CHAR (MIN (paaf.effective_start_date), 'DD-MON-YYYY')
            END)                                                                EFFECTIVE_START_DATE,
           DECODE (TO_CHAR (MAX (paaf.effective_end_date), 'DD-MON-RRRR'),
                   '31-DEC-4712', NULL,
                   TO_CHAR (MAX (paaf.effective_end_date), 'DD-MON-RRRR'))      EFFECTIVE_END_DATE,
   FROM   apps.per_all_people_f papf,
           apps.per_all_assignments_f paaf,
           apps.per_grades pg,
           apps.per_jobs pj
   WHERE       papf.person_id = paaf.person_id
           AND papf.employee_number = '2130'
           AND papf.current_employee_flag = 'Y'
           AND paaf.grade_id = pg.grade_id
           AND paaf.job_id = pj.job_id
           AND (   paaf.ass_attribute21 IS NOT NULL
                OR paaf.ass_attribute22 IS NOT NULL
                OR paaf.ass_attribute23 IS NOT NULL
                OR paaf.ass_attribute24 IS NOT NULL
                OR paaf.ass_attribute25 IS NOT NULL)
           AND EXISTS
                 (SELECT   pap.EMPLOYEE_NUMBER
                    FROM   APPS.PER_ALL_PEOPLE_F PAP
                   WHERE   TRUNC (SYSDATE) BETWEEN PAP.EFFECTIVE_START_DATE AND  PAP.EFFECTIVE_END_DATE
                           AND PAP.CURRENT_EMPLOYEE_FLAG = 'Y'
                           AND PAP.EMPLOYEE_NUMBER = PAPF.EMPLOYEE_NUMBER)
           AND PAAF.EFFECTIVE_START_DATE >
                 NVL (
                    (SELECT   MAX (PAAFA.EFFECTIVE_START_DATE)
                                 EFFECTIVE_START_DATE
                       FROM   APPS.PER_ALL_ASSIGNMENTS_F PAAFA,
                              APPS.PER_PERIODS_OF_SERVICE PPOSA
                      WHERE   PAAFA.PERIOD_OF_SERVICE_ID =
                                 PPOSA.PERIOD_OF_SERVICE_ID
                              AND (UPPER (PPOSA.LEAVING_REASON) NOT LIKE
                                      '%TRANSFER%')
                              AND PPOSA.ACTUAL_TERMINATION_DATE < SYSDATE
                              AND PAAFA.PERSON_ID IN
                                       (SELECT   DISTINCT PERSON_ID
                                          FROM   apps.per_all_people_f
                                         WHERE   employee_number =
                                                    PAPF.EMPLOYEE_NUMBER)),
                    TO_DATE ('01-JAN-1881')
GROUP BY   papf.employee_number,
           papf.person_id,
           paaf.assignment_id,
           fnd_date.canonical_to_date (papf.ATTRIBUTE29),
           papf.business_group_id,
           TRIM(SUBSTR (PAAF.ASS_ATTRIBUTE21,
                        INSTR (PAAF.ASS_ATTRIBUTE21, '-') + 1)),
           TRIM(SUBSTR (PAAF.ASS_ATTRIBUTE22,
                        INSTR (PAAF.ASS_ATTRIBUTE22, '-') + 1)),
           UPPER (paaf.ass_attribute23),
           UPPER (paaf.ass_attribute24),
           UPPER (paaf.ass_attribute25),
           xx_ijp_get_loc (paaf.ass_attribute23),
           pg.name,
           pj.name
ORDER BY   papf.employee_number, MIN (paaf.effective_start_date) DESC -----------------
Output of the query
EFFECTIVE_START_DATE     EFFECTIVE_END_DATE
13-JAN-2010     
15-DEC-2009          12-JAN-2010
09-JUN-2009          14-DEC-2009
05-JUN-2009          08-JUN-2009
22-SEP-2008          04-JUN-2009
21-APR-2008          21-SEP-2008
21-JAN-2008          20-APR-2008
01-JAN-2008          20-JAN-2008
04-APR-2007          31-DEC-2007While using when in case statment i want to put the condition from where condition of main query and pick the min value of EFFECTIVE_START_DATE column i.e 04-APR-2007 so i can replace this with employee Date of Joining through Case condtion.
Any solution for this.
Please suggest it's bit urgent.
Thanks
Bachan.

Answer 1

Bachan wrote:
Please suggest it's bit urgent.Ok, I'll suggest it's a bit urgent...
"it's a bit urgent"
But only to you.
Everybody who posts a question would like it answering as soon as possible. Do you not think it's rude of you to expect that your question demands more immediate attention than someone elses? Is that fair on all the other people who've just asked their question and are patient enough to wait for answers? Or should they be happy that you're jumping up and down saying "me first! me first!"
What about everybody who's giving up their own time volunteering to answer questions? They have their own jobs to do as well. Do you not think it's rude to expect them to drop what they're doing to just help you because you think your question is "urgent".
Typically, you will find that less people will come to help you if you say your question is urgent because most people will ignore it as they consider it rude. The best way to ask you question is to give as much information as possible and ensure you state what your database version is, as well as providing table structures, example data and expected output, so that the most appropriate answer can be given.
Looking at your code, it's not clear what your problem is as we don't have the input data to try it ourselves.
One clear issue is:
TO_DATE ('01-JAN-1881')As you don't specify a format mask so it will rely on your NLS_DATE_FORMAT mask being set to DD-MON-YYYY which, if it's not, will cause the code to either give incorrect results or error.