How the group using SQL for the desired output.

Hi all

I am currently using oracle 10.2.0.4.0

Create a table script:
CREATE TABLE FORTEST
( gpno VARCHAR2(10 BYTE),
  classnumber  VARCHAR2(10 byte),
  age_min NUMBER,
  age_max NUMBER,
  amount NUMBER)
INSERT statement:
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 01,0,29,1) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 01,30,35,2) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 01,36,40,3) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 02,0,29,1) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 02,30,35,2) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 02,36,40,5) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 03,0,29,1) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 03,30,35,2) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G123' , 03,36,40,3) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G124' , 01,0,29,1) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G124' , 01,30,35,2) 
insert into fortest  (GPNO,classnumber,age_min,age_max,amount) values
('G124' , 01,36,40,3)
power required:
gpno    classnumber    age_min    age_max    amount
G123    1,3                0        29        1
G123    1,3                30       35        2
G123    1,3                36       40        3
G123    2                  0        29        1
G123    2                  30       35        2
G123    2                  36       40        5
G124    1                  0        29        1
G124    1                  30       35        2
G124    1                  36       40        3
as for gpno g123, classnumber 1 and 3, the rates are the same in all the age_min and age_max they need to be grouped.
even if gpno 123 classnumber 2 has the same rates as the classesnumber 1 and 3 for the age groups 0 to 29 and 30 to 35,
rates are different for ages 36 to 40. so it should not be placed together. How can I do this in SQL

any help is appreciated.

Thanks in advance.

Hello

Thorny problem!

Unfortunately, LISTAGG was created to the Oracle 11.2. About half of the complexity here is the aggregation of chain, i.e. forming the list of the classnumbers, as '1.3', using only functions available in Oracle 10.2.

Here's a solution:

WITH     got_gpno_classnumber_cnt   AS
(
     SELECT     gpno, classnumber, age_min, age_max, amount
     ,     COUNT (*) OVER ( PARTITION BY  gpno
                                  ,            classnumber
                      )   AS gpno_classnumber_cnt
     FROM    fortest
--     WHERE     ...     -- If you need any filtering, this is where it goes
)
,     pairs          AS
(
     SELECT    a.gpno
     ,       a.classnumber
     ,       MIN (b.classnumber)
                OVER ( PARTITION BY  a.gpno
                          ,                    a.classnumber
                  )     AS super_classnumber
     FROM       got_gpno_classnumber_cnt  a
     JOIN       got_gpno_classnumber_cnt  b  ON   a.gpno     = b.gpno
                                  AND  a.age_min     = b.age_min
                                AND  a.age_max     = b.age_max
                                AND  a.amount     = b.amount
                                AND  a.gpno_classnumber_cnt
                                        = b.gpno_classnumber_cnt
     GROUP BY  a.gpno
     ,            a.classnumber
     ,       b.classnumber
     HAVING       COUNT (*)     = MIN (a.gpno_classnumber_cnt)
)
,     got_rnk          AS
(
     SELECT DISTINCT
             gpno, classnumber, super_classnumber
     ,     DENSE_RANK () OVER ( PARTITION BY  gpno
                               ,                    super_classnumber
                               ORDER BY          classnumber
                       )         AS rnk
     FROM    pairs
)
,     got_classnumbers     AS
(
     SELECT     gpno, classnumber, super_classnumber
     ,      SUBSTR ( SYS_CONNECT_BY_PATH (classnumber, ',')
                   , 2
                 )     AS classnumbers
     FROM     got_rnk
     WHERE     CONNECT_BY_ISLEAF = 1
     START WITH     rnk             = 1
     CONNECT BY     rnk             = PRIOR rnk + 1
          AND     gpno             = PRIOR gpno
          AND     super_classnumber  = PRIOR super_classnumber
)
SELECT DISTINCT
       g.gpno
,       c.classnumbers
,       g.age_min
,       g.age_max
,       g.amount
FROM       got_gpno_classnumber_cnt  g
JOIN       got_classnumbers         c  ON   c.gpno        = g.gpno
                             AND  c.classnumber  = g.classnumber
ORDER BY  g.gpno
,            c.classnumbers
;

Out (just as you requested):

GPNO       CLASSNUMBERS       AGE_MIN    AGE_MAX     AMOUNT
---------- --------------- ---------- ---------- ----------
G123       1,3                      0         29          1
G123       1,3                     30         35          2
G123       1,3                     36         40          3
G123       2                        0         29          1
G123       2                       30         35          2
G123       2                       36         40          5
G124       1                        0         29          1
G124       1                       30         35          2
G124       1                       36         40          3

Tags: Database

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