Thread: Sorting

Sorting

From

"Bart McFarling"

Date:

08 January 2007, 15:43:00

I have a column that is a varchar(6) I need to sort it by the rows that are integers 1st then the character ones or vice versa, I just need the values that can be converted to integer to sort by their numeric value.

i.e

1, 2, 3, 4, 5, 10, 11, A, B, C

instead of

1, 10, 11, 2, 3, 4, 5, A, B, C

Any suggestions?

Re: Sorting

From

"A. Kretschmer"

Date:

08 January 2007, 15:59:46

am  Mon, dem 08.01.2007, um 10:21:38 -0600 mailte Bart McFarling folgendes:
> I have a column that is a varchar(6) I need to sort it by the rows that are
> integers 1st then the character ones or vice versa, I just need the values that
> can be converted to integer to sort by their numeric value.
>
> i.e
> 1, 2, 3, 4, 5, 10, 11, A, B, C
> instead of
> 1, 10, 11, 2, 3, 4, 5, A, B, C
>
> Any suggestions?

perhaps something like this:

test=*# select * from foo;
 w
----
 10
 1
 A
 3
 C
(5 rows)

Time: 1.349 ms
test=*# select w, case when w ~ '^[0-9]*$' then w::int else 10000 end from foo order by 2,1;
 w  | case
----+-------
 1  |     1
 3  |     3
 10 |    10
 A  | 10000
 C  | 10000
(5 rows)


Andreas
--
Andreas Kretschmer
Kontakt:  Heynitz: 035242/47150,   D1: 0160/7141639 (mehr: -> Header)
GnuPG-ID:   0x3FFF606C, privat 0x7F4584DA   http://wwwkeys.de.pgp.net

Re: Sorting

From

Ragnar

Date:

08 January 2007, 16:10:30

On mán, 2007-01-08 at 17:59 +0100, A. Kretschmer wrote:
> am  Mon, dem 08.01.2007, um 10:21:38 -0600 mailte Bart McFarling folgendes:
> > I have a column that is a varchar(6) I need to sort it by the rows that are
> > integers 1st then the character ones or vice versa, I just need the values that
> > can be converted to integer to sort by their numeric value.
> >
> > i.e
> > 1, 2, 3, 4, 5, 10, 11, A, B, C
> > instead of
> > 1, 10, 11, 2, 3, 4, 5, A, B, C
> >
> > Any suggestions?
>
> perhaps something like this:
>
> test=*# select * from foo;
>  w
> ----
>  10
>  1
>  A
>  3
>  C
> (5 rows)
>
> Time: 1.349 ms
> test=*# select w, case when w ~ '^[0-9]*$' then w::int else 10000 end from foo order by 2,1;

possible improvements:
  a) w ~ '^[0-9]+$'
  b) use NULL instead of 10000


gnari

Re: Sorting

From

Andreas Kretschmer

Date:

08 January 2007, 16:17:03

Ragnar <gnari@hive.is> schrieb:
> > test=*# select w, case when w ~ '^[0-9]*$' then w::int else 10000 end from foo order by 2,1;
>
> possible improvements:
>   a) w ~ '^[0-9]+$'
>   b) use NULL instead of 10000

Thanks, right.


Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.                              (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly."    (unknow)
Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°

Re: Sorting

From

"Bart McFarling"

Date:

08 January 2007, 16:25:58

Thanks,

-----Original Message-----
From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of Andreas Kretschmer
Sent: Monday, January 08, 2007 11:19 AM
To: pgsql-general@postgresql.org
Subject: Re: [GENERAL] Sorting

Ragnar <gnari@hive.is> schrieb:
> > test=*# select w, case when w ~ '^[0-9]*$' then w::int else 10000
> > end from foo order by 2,1;
>
> possible improvements:
>   a) w ~ '^[0-9]+$'
>   b) use NULL instead of 10000

Thanks, right.


Andreas
--
Really, I'm not out to destroy Microsoft. That will just be a completely
unintentional side effect.                              (Linus Torvalds)
"If I was god, I would recompile penguin with --enable-fly."    (unknow)
Kaufbach, Saxony, Germany, Europe.              N 51.05082°, E 13.56889°

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