# Sorting and Grouping -Two months in this query

**Ayham**Jan 4, 2013 8:35 AM

Hi All,

many thanks for jeneesh

i am doing project for construction company, i face this problem in grouping points according to relation between these points the

Relation is from 1 to 100. If the point between this rang that mean there is relation between these points.

this question already solve but the results not correct when the table has more data.

SQL - sorting and grouping.

from jeneesh and many thanks for him.

This example for more clarifications

for example i have these points

- points 1,2,3 in one group why becuase 1,2 has relation and 1,3 has relation that mean 1,3 also has hidden relation.

- Points 6,8,10,11 in second group there are relations between them .

- but no relation between 1 or 2 or 3 with any point of 6,8,9,10,11

- as well as no relation between 15, 14 that mean 14 in third group and 15 in fourth group.

whati need?

to group the points that has relation according to percentage value ascending

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

I have the follwoing table with data

SQL> /

but the correct is

Edited by: Ayham on Nov 30, 2012 3:07 AM

many thanks for jeneesh

i am doing project for construction company, i face this problem in grouping points according to relation between these points the

Relation is from 1 to 100. If the point between this rang that mean there is relation between these points.

this question already solve but the results not correct when the table has more data.

SQL - sorting and grouping.

from jeneesh and many thanks for him.

This example for more clarifications

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%
```

Also , we can see the relation between these points as follwoing- points 1,2,3 in one group why becuase 1,2 has relation and 1,3 has relation that mean 1,3 also has hidden relation.

- Points 6,8,10,11 in second group there are relations between them .

- but no relation between 1 or 2 or 3 with any point of 6,8,9,10,11

- as well as no relation between 15, 14 that mean 14 in third group and 15 in fourth group.

whati need?

to group the points that has relation according to percentage value ascending

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

I have the follwoing 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);
```

the 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 correct 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
```

many thanks in advance.Edited by: Ayham on Nov 30, 2012 3:07 AM

- 131 Views
- Tags: none (add)