Sorting and grouping - two months in this query

Hi all

Thanks a lot for JAC

I am doing a project for the construction company, I faced this problem by grouping points according to the relationship between these points the
Relationship is from 1 to 100. If the point between what means there is relationship between these points has come.

resolve this question already, but the results does not correct when the table contains more data.

SQL - sorting and grouping.
Jac and thanks a lot to him.

This example for more details

for example, I have these points
id   location         percentage   comments 
1     loc 1,2          20%                that mean point  1 and 2 close to each other by 20%
2     loc 1,3          40%              that mean point 1 and 3 close to each other byy 40%
3     Loc 8,6          25%               that mean point 8 and 6 close to each other by 25% 
4     Loc  6,10        20%
5     LOC 11,10        10 %
6     LOC 15,14         0%
In addition, we can see the relationship between these points as follows
-points 1,2,3 in a group why because close 1.2 and 1.3 a relationship which means 1.3 also hid the relationship.
-Points 6,8,10,11 in the second group there are the relationships between them.
- but no relationship between 1, 2 or 3 with any point of 6,8,9,10,11
-as well as no relationship between 15, 14, which means 14 in the third group and 15 in the fourth group.


Whati need?

to group the points that growing a relationship according to the percentage value


The most important part is to group the points. For EXAMPLE, the query below, the gropuing is not correct.

I have the following table with data
drop table temp_value; 
create table temp_value(id number(10),location varchar2(20), percentage number(9)); 
 
 
insert into temp_value values  (1,'LOC 1,2',10); 
insert into  temp_value values (2,'LOC 1,3',0); 
insert into  temp_value values (3,'LOC 1,4',0); 
insert into  temp_value values (4,'LOC 1,5',0); 
insert into  temp_value values (5,'LOC 1,6',0); 
insert into  temp_value values (6,'LOC 2,3',0); 
insert into  temp_value  values(7,'LOC 2,4',0); 
insert into  temp_value values (8,'LOC 2,5',30); 
insert into  temp_value values (9,'LOC 2,6',0); 
insert into  temp_value values (10,'LOC 3,4',0); 
insert into  temp_value values (11,'LOC 3,5',0); 
insert into  temp_value values (12,'LOC 4,5',40); 
insert into  temp_value values (13,'LOC 4,6',0); 
insert into  temp_value values (14,'LOC 6,7',40);
insert into  temp_value values (15,'LOC 7,2',0);
insert into  temp_value values (16,'LOC 8,2',60);
insert into  temp_value values (17,'LOC 8,3',0);
insert into  temp_value values (18,'LOC 3,1',0);
insert into  temp_value values (19,'LOC 9,6',30);
insert into  temp_value values (20,'LOC 11,2',0);
insert into  temp_value values (22,'LOC 12,3',10);
insert into  temp_value values (23,'LOC 19,3',0);
insert into  temp_value values (24,'LOC 17,3',0);
insert into  temp_value values (24,'LOC 20,3',0);
When I used this query, the results is not correct

 with t as
    (select percentage,loc1,loc2,sum(case when percentage = 0 then 1
                       when loc1 in (l1,l2) then 0
                   when loc2 in (l1,l2) then 0
                   when l1 is null and l2 is null then 0
                   else 1
              end) over(order by rn) sm
    from (     select id,location,percentage,
                       regexp_substr(location,'\d+',1,1) LOC1,
                      regexp_substr(location,'\d+',1,2)  LOC2,
                     lag(regexp_substr(location,'\d+',1,1))
                      over(order by percentage desc) l1,
                      lag(regexp_substr(location,'\d+',1,2))
                      over(order by percentage desc) l2,
              row_number() over(order by percentage desc) rn
      from temp_value
      order by percentage desc
        )
  )
   select loc,min(sm)+1 grp
     from(
       select loc,rownum rn,sm
       from(
       select percentage,decode(rn,1,loc1,loc2) loc,sm
       from t a,
            (select 1 rn from dual union all
             select 2 from dual ) b
       order by percentage desc,decode(rn,1,loc1,loc2) asc
      )
   )
    group by loc
   order by min(sm),min(rn);
results


SQL > /.
LOC                         GRP
-------------------- ----------
2                             1
8                             1
6                             2
7                             2
4                             3
5                             3
9                             4
1                             5
12                            6
3                             6
11                           13

LOC                         GRP
-------------------- ----------
19                           14
17                           15
20                           22

14 rows selected.
SQL >


but the just is
Location        group No
2                  1
8                  1
4                  1
5                  1
1                  1
6                  2
7                  2
9                  2
12                 3
3                  3
19                 4
17                 5
20                 6
Thanks in advance.

Published by: Isabelle on November 30, 2012 03:07

OK, I thought an it once again and found out how to include with any such percentage points.
In your example expected output you missed the 11 that's why we got 7 groups now.
The order of the Group 2 and 3 is ambiguous, because the highest percentage of these groups is the same.

with connects as (
select distinct
 loc1
,loc2
,connect_by_root(loc1) grp
,percentage per
from
temp_value
--start with
--percentage != 0
connect by nocycle
(prior loc2 = loc1
or
prior loc1 = loc2
or
prior loc1 = loc1
or
prior loc2 = loc2)
and
percentage != 0
and
prior percentage != 0
)

select
 loc
,dense_rank() over (order by decode(per,0,1,0), grp) grp
from (
select
 loc
,max(grp) keep (dense_rank first order by per desc, grp) grp
,max(per) keep (dense_rank last order by per nulls first) per
from (
select
 loc1 loc
,grp
,per
from connects
union
select
 loc2
,grp
,per
from connects
)
group by
loc )
order by 2,per desc,1

LOC     GRP
2     1
8     1
4     1
5     1
1     1
12     2
3     2
6     3
7     3
9     3
11     4
17     5
19     6
20     7

Think we are done now ;-)
Edited by: chris227 at 30.11.2012 16:46

Edited by: chris227 at 30.11.2012 17:12
order corrected

Edited by: chris227 at 30.11.2012 17:15
simplification, no need to rank in linking subquery

Edited by: chris227 at 30.11.2012 17:26

Tags: Database

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    (If asked, select 'run.) --> Click on NEXT--> select 'I agree' and click
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    Restart, and then log on as an administrative user.

    Visit this web page:

    How to reset the Windows Update components?
    http://support.Microsoft.com/kb/971058

    ... and click on the "Microsoft Fix it."  When asked, select "RUN."
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    http://support.Microsoft.com/kb/315265
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    How to defragment your hard drives
    http://support.Microsoft.com/kb/314848
    * will take time

    Reboot again.
    Log in as a user with administrative rights and open Internet Explorer
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    Whenever you are about to click on something in these pages - web
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    release the CTRL key after clicking on each time.

    Once the scan is complete, select that ONLY updates of high priority
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    Reboot again.

    If it worked - try the web page - selection not more than 3-5 a
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    Seriously - do these things.  It's like antibiotics - do not skip a single
    step, don't leave because you think it will be ok now - review
    until the end, until you have done all given in the order shown.  If
    you have a problem with a step to ask and let someone here, you get
    Thanks to this step.  If you do not understand how to bring one back
    and ask here on this step and let someone guide you through it.

    Then - actually - that everyone here knows if it worked for you - or if
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    --
    Martin Stanley
    MS - MVP
    --
    How to ask Questions the Smart way
    http://www.CatB.org/~ESR/FAQs/smart-questions.html

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