Help in getting desired output

Question

I need to generate a report products per month and also running total.Here below i am consolidated my data to one table as below sample.This will going to run for 10 years of data.Can any one suggest the solution for this.
CREATE TABLE test_Prd(
     PrdId int ,
     PrdSrl varchar(10) ,
     PlcyCd char(2) ,
     WntyStDate datetime
INSERT INTO test_Prd VALUES (1001,'F1001','QB','03/13/2008');
INSERT INTO test_Prd VALUES (1002,'F1002','QB','01/22/2008');
INSERT INTO test_Prd VALUES (1003,'W1001','QB','02/02/2008');
INSERT INTO test_Prd VALUES (1004,'F1003','SB','05/10/2008');
INSERT INTO test_Prd VALUES (1005,'F1005','SB','04/24/2008');
INSERT INTO test_Prd VALUES (1006,'F1006','QB','02/10/2008');
INSERT INTO test_Prd VALUES (1007,'W1002','QB','03/20/2008');
INSERT INTO test_Prd VALUES (1008,'F1007','QB','04/22/2008');
INSERT INTO test_Prd VALUES (1009,'F1008','QB','06/17/2008');
INSERT INTO test_Prd VALUES (1010,'F1009','SB','08/12/2008');
INSERT INTO test_Prd VALUES (1011,'F10011','SB','03/13/2008');
INSERT INTO test_Prd VALUES (1012,'F10012','SB','01/22/2008');
INSERT INTO test_Prd VALUES (1013,'W10011','QB','02/02/2008');
INSERT INTO test_Prd VALUES (1014,'F10013','QB','05/10/2008');
INSERT INTO test_Prd VALUES (1016,'W10016','QB','02/10/2008');
INSERT INTO test_Prd VALUES (1017,'W10012','QB','05/20/2008');
INSERT INTO test_Prd VALUES (1015,'F10015','QB','04/24/2008');
INSERT INTO test_Prd VALUES (1018,'F10017','SB','04/14/2008');
INSERT INTO test_Prd VALUES (1019,'F10018','QB','06/17/2008');
INSERT INTO test_Prd VALUES (1020,'F10019','QB','08/12/2008');
select substring(prdsrl,1,1) as sprd
,plcycd
,datediff(month,wntystdate,'08/31/2008') as mnth
,count(*) as cnt
from test_Prd
WHERE wntystdate BETWEEN '01/01/2007' AND '08/31/2008'
and datediff(month,wntystdate,'08/31/2008')>0
group by substring(prdsrl,1,1)
          ,plcycd
          ,datediff(month,wntystdate,'08/31/2008')
order by 1,2,3
the OUT PUT should look like below
sprd plcycd mnth cnt total
F QB 1 0 8
F QB 2 2 8
F QB 3 1 6
F QB 4 2 5
F QB 5 1 3
F QB 6 1 2
F QB 7 1 1
F SB 1 0 5
F SB 2 0 5
F SB 3 1 5
F SB 4 2 4
F SB 5 1 2
F SB 6 0 1
F SB 7 1 1
W QB 1 0 5
W QB 2 0 5
W QB 3 1 5
W QB 4 0 4
W QB 5 1 4
W QB 6 3 3

Answer 1

Hi,
There must be something simpler, but here's one way to do that in Oracle SQL:
WITH     d     AS
(          -- Begin sub-query d, transformed data
     SELECT     SUBSTR (prdsrl, 1, 1)               AS sprd
     ,     plcycd
     ,     TRUNC     ( MONTHS_BETWEEN     ( TO_DATE (:end_date, 'MM/DD/YYYY')
                              , Wntystdate
               )                    AS mnth
     FROM     test_Prd
     WHERE     wntystdate     BETWEEN TO_DATE (:begin_date, 'MM/DD/YYYY')
                    AND     TO_DATE (:end_date, 'MM/DD/YYYY')
)          -- End sub-query d, transformed data
,     g     AS
(          -- Begin sub-query g, GROUP BY
     SELECT     sprd
     ,     plcycd
     ,     mnth
     ,     COUNT (*)     AS cnt
     FROM     d
     WHERE     mnth     > 0
     GROUP BY     sprd
     ,          plcycd
     ,          mnth
)          -- End sub-query g, GROUP BY
,     m     AS
(          -- Begin sub-query m, all possible months
     SELECT     ROWNUM     AS mnth
     FROM     (     SELECT     MAX (mnth)     AS max_mnth
               FROM     g
     CONNECT BY     ROWNUM     <= max_mnth
)          -- End  sub-query m, all possible months
,     c     AS
(          -- Begin sub-query c, all combinations of sprd, plcycd and mnth
     SELECT DISTINCT
          g.sprd
     ,     g.plcycd
     ,     m.mnth
     FROM          m
     CROSS JOIN     g
)          -- End sub-query c, all combinations of sprd, plcycd and mnth
,     t     AS
(          -- Begin sub-query t, to compute total
     SELECT     c.*
     ,     NVL     (g.cnt, 0)     AS cnt
     ,     NVL     ( SUM (cnt) OVER
                    (     PARTITION BY     c.sprd
                         ,          c.plcycd
                         ORDER BY     c.mnth     DESC
               , 0
               )          AS total
     FROM          c
     LEFT OUTER JOIN     g     ON     c.sprd          = g.sprd
                    AND     c.plcycd     = g.plcycd
                    AND     c.mnth          = g.mnth
)          -- End sub-query t, to compute total
SELECT     *
FROM     t
WHERE     total     > 0
ORDER BY     sprd
,          plcycd
,          mnth
;I'm guessing at what the function datedif does.