Re: sql basic question - Mailing list pgsql-sql
| From | Antonio Parrotta |
|---|---|
| Subject | Re: sql basic question |
| Date | |
| Msg-id | CAByPMPLbFJqw5vb8XruHLtY2=Z75_BNKbKcHz8SnKqMvy5Td4Q@mail.gmail.com Whole thread Raw |
| In response to | sql basic question (Antonio Parrotta <antonioparrotta@gmail.com>) |
| Responses |
Re: sql basic question
|
| List | pgsql-sql |
Hello Andreas,
apologize for the misunderstanding. Hope to clarify now. For each ID I want a min and max for each SIDE. I have about 160K records like this:
label | id | distance | side
-------+--------+-------------------+------
15 | 119006 | 0.10975569030617 | 1 *m
14 | 119006 | 0.11844830745091 | 0 *m
16 | 119006 | 0.17624040731777 | 0
20 | 119006 | 0.39363711745035 | 0 *M
19 | 119006 | 0.41205442839764 | 1 *M
24 | 119006 | 0.35455674575682 | 1
-------+--------+-------------------+------
15 | 119006 | 0.10975569030617 | 1 *m
14 | 119006 | 0.11844830745091 | 0 *m
16 | 119006 | 0.17624040731777 | 0
20 | 119006 | 0.39363711745035 | 0 *M
19 | 119006 | 0.41205442839764 | 1 *M
24 | 119006 | 0.35455674575682 | 1
12 | 23434 | 0.88764543364566 | 0 *M
31 | 23434 | 0.53456343463466 | 0 *m
33 | 23434 | 0.23235478697988 | 1 *m/M
01 | 23434 | 0.59758734628752 | 0
14 | 129007 | 0.63454675634756 | 0 *m
13 | 129007 | 0.22345364656788 | 1 *m
11 | 129007 | 0.86787897897689 | 1 *M
12 | 129007 | 0.34678678978089 | 1
19 | 129007 | 0.97897897897654 | 0 *M
(*M maximum for that ID and SIDE, *m minimum for that ID and SIDE)
result should be:
14 | 119006 | 0.11844830745091 | 0 *m
20 | 119006 | 0.39363711745035 | 0 *M
20 | 119006 | 0.39363711745035 | 0 *M
15 | 119006 | 0.10975569030617 | 1 *m
19 | 119006 | 0.41205442839764 | 1 *M
31 | 23434 | 0.53456343463466 | 0 *m
12 | 23434 | 0.88764543364566 | 0 *M
33 | 23434 | 0.23235478697988 | 1 *m/M
14 | 129007 | 0.63454675634756 | 0 *m
19 | 129007 | 0.97897897897654 | 0 *M
13 | 129007 | 0.22345364656788 | 1 *m
11 | 129007 | 0.86787897897689 | 1 *M
thanks
- Antonio
On 28 December 2012 15:19, Andreas Kretschmer <andreas@a-kretschmer.de> wrote:
Hi,
your question was: "What I want to achieve is a result table with min and max
distance for each side".
Okay, with SIDE in 0,1,-1,2,-2,3,-3 there are exactly 14 possible values for
each SIDE and Min/Max.
If this is wrong, describe your problem better.
Antonio Parrotta <antonioparrotta@gmail.com> hat am 28. Dezember 2012 um 15:12
geschrieben:> Hi Andreas, Anton,> *Andrea's *query is failing because it is getting only distinct SIDEs. The
>
> I did some test and both queries didn't worked. Maybe I was not clear with
> the example provided.
> My table contains more than 160K records with SIDE 0, 1, -1, 2, -2, 3 and
> -3.
> Example provided is a very small subset.
>> query returns just 14 rows.> *Anton's *one because it is joining on distance so merges records without a
>> relation (I have many rows with a distance of 0 for example). I need to
> have a join on IDs instead
>
> Thanks
>
> - Antonio
>
>
> On 28 December 2012 13:00, Andreas Kretschmer <andreas@a-kretschmer.de>wrote:
>
> > >
> > > so the result should be:
> > > LABEL ID Distance SIDE
> > > "15"; 119006; 0.10975569030617; 1
> > > "19"; 64056; 0.41205442839764; 1
> > > "14"; 64054; 0.118448307450912; 0
> > > "24"; 119007; 0.59758734628752; 0
> > >
> > >
> >
> >
> >
> > test=*# select * from foo;
> > label | id | distance | side
> > -------+--------+-------------------+------
> > 15 | 119006 | 0.10975569030617 | 1
> > 14 | 64054 | 0.118448307450912 | 0
> > 16 | 64055 | 0.176240407317772 | 0
> > 20 | 64057 | 0.39363711745035 | 0
> > 19 | 64056 | 0.41205442839764 | 1
> > 24 | 119007 | 0.59758734628752 | 0
> > (6 rows)
> >
> > test=*# select * from (select distinct on (side) label, id, distance, side
> > from
> > foo order by side, distance) a union all (select distinct on (side) label,
> > id,
> > distance, side from foo order by side, distance desc) order by side desc,
> > label;
> > label | id | distance | side
> > -------+--------+-------------------+------
> > 15 | 119006 | 0.10975569030617 | 1
> > 19 | 64056 | 0.41205442839764 | 1
> > 14 | 64054 | 0.118448307450912 | 0
> > 24 | 119007 | 0.59758734628752 | 0
> > (4 rows)
> >
> >
> > HTH, Andreas
> >
> Hi Andreas, Anton,
>
> I did some test and both queries didn't worked. Maybe I was not clear with the
> example provided.
> My table contains more than 160K records with SIDE 0, 1, -1, 2, -2, 3 and -3.
> Example provided is a very small subset.
>
> Andrea's query is failing because it is getting only distinct SIDEs. The query
> returns just 14 rows.
>
> Anton's one because it is joining on distance so merges records without a
> relation (I have many rows with a distance of 0 for example). I need to have a
> join on IDs instead
>
> Thanks
>
> - Antonio
>
>
> On 28 December 2012 13:00, Andreas Kretschmer <andreas@a-kretschmer.de> wrote:
> > >
> > > so the result should be:
> > > LABEL ID Distance SIDE
> > > "15"; 119006; 0.10975569030617; 1
> > > "19"; 64056; 0.41205442839764; 1
> > > "14"; 64054; 0.118448307450912; 0
> > > "24"; 119007; 0.59758734628752; 0
> > >
> > >
> >
> >
> >
> > test=*# select * from foo;
> > label | id | distance | side
> > -------+--------+-------------------+------
> > 15 | 119006 | 0.10975569030617 | 1
> > 14 | 64054 | 0.118448307450912 | 0
> > 16 | 64055 | 0.176240407317772 | 0
> > 20 | 64057 | 0.39363711745035 | 0
> > 19 | 64056 | 0.41205442839764 | 1
> > 24 | 119007 | 0.59758734628752 | 0
> > (6 rows)
> >
> > test=*# select * from (select distinct on (side) label, id, distance, side
> > from
> > foo order by side, distance) a union all (select distinct on (side) label,
> > id,
> > distance, side from foo order by side, distance desc) order by side desc,
> > label;
> > label | id | distance | side
> > -------+--------+-------------------+------
> > 15 | 119006 | 0.10975569030617 | 1
> > 19 | 64056 | 0.41205442839764 | 1
> > 14 | 64054 | 0.118448307450912 | 0
> > 24 | 119007 | 0.59758734628752 | 0
> > (4 rows)
> >
> >
> > HTH, Andreas