Analytic query to select next record

Question

Hi all,
I would like to query the below two table match to ouput.
1.dev_wt 2.dev_map 3.Output Result
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1. dev_wt
PMS_COMP     PMS_I       PMS_PERF_D   PMS_WT   PMS_CREATION_D
BBOARD     GICEQGROSS    04/01/2001     30     04/05/2001
BBOARD     GICST_B       04/01/2001     5      04/05/2001
BBOARD     SBGS_B        04/01/2001     65     04/05/2001
BBOARD     GICEQGROSS    04/11/2001     30     04/15/2001
BBOARD     GICST_B       04/11/2001     5      04/15/2001
BBOARD     SBGS_B        04/11/2001     65     04/15/20012. dev_map
GS_CODE     GS_I_CODE    GS_I_ID  MD_ID   GS_START_DT    GS_END_DT
GICEQGROSS   CIWL        304       15     01/04/1998     31/03/2004
GICEQGROSS   CIWL        304       2     01/04/2004      31/03/9998
GICST_B      GICST_B     3707      15     01/04/2000     31/12/9998
SBGS_B       SBGS_B      2231      15     01/04/1992     30/09/2003
SBGS_B       SBGS_B      564       15     01/10/2003     31/12/9998I would like to match PMS_I = GS_CODE to retrieve GS_I_CODE and using analytic
query to find next record.
Because I need to select GICEQGROSS record of PMS_PERF_D date and next
GICEQGROSS record of PMS_PERF_D from dev_wt table and put GS_WT_FR and GS_WT_TO of Output result.
***Date is change to YYYYMMDD format
***PMS_WT is devided by 100
*3. Output Result*
GS_I_ID    PMS_COMP     GS_I_CODE     GS_WT_FR     GS_WT_TO     GS_I_CALC
304       BBOARD        CIWL          20010401     20010410     0.3
3707      BBOARD        GICST_B       20010401     20010410     0.05
5209      BBOARD        SBGS_B        20010401     20010410     0.65PMS_COMP is from dev_wt table
GS_I_CODE is from dev_map table join with dev_wt
GS_WT_FR is from dev_wt table of GS_START_DT
GS_WT_TO is from dev_wt table of next record GS_START_DT where PMS_I ='GICEQGROSS'
Now my difficulty is to select next record of PMS_PERF_D using analytic query. Below
is my query...
SELECT GS_I_ID, PMS_COMP, GS_I_CODE, GS_WT_FR, GS_WT_TO, GS_I_CALC
FROM dev_wt (
SELECT lead(PMS_PERF_D) over(partition by PMS_I order by PMS_PERF_D) as GS_WT_TO       
FROM dev_wt where PMS_I ='GICEQGROSS')
left join dev_map on PMS_I = GS_CODE ;Thanks
Edited by: WinZone on Jul 24, 2010 4:46 PM
Edited by: WinZone on Jul 24, 2010 4:50 PM

Answer 1

Hi,
This query should be fine:
SELECT DISTINCT t2.gs_i_id, pms_comp, t2.gs_i_code,
                TO_CHAR
                   (MIN (pms_perf_d) OVER (PARTITION BY pms_comp, pms_i),
                    'yyyymmdd'
                   ) gs_wt_fr,
                TO_CHAR
                   (MAX (pms_perf_d) OVER (PARTITION BY pms_comp, pms_i) - 1,
                    'yyyymmdd'
                   ) gs_wt_to,
                pms_wt / 100 gs_i_calc
           FROM dev_wt t1, dev_map t2
          WHERE t2.gs_code = t1.pms_iREM Same remark as odie: should be "2231" instead ...