Re: reformatting floats ?

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От Gauthier, Dave
Тема Re: reformatting floats ?
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Msg-id D7FF158337303A419CF4A183F48302D603704A61@hdsmsx411.amr.corp.intel.com
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Ответ на Re: reformatting floats ?  (Andreas Kretschmer <akretschmer@spamfence.net>)
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Both work (to_char and casting to numeric)
Thanks !

-----Original Message-----
From: pgsql-general-owner@postgresql.org [mailto:pgsql-general-owner@postgresql.org] On Behalf Of Andreas Kretschmer
Sent: Thursday, December 06, 2007 1:46 PM
To: pgsql-general@postgresql.org
Subject: Re: [GENERAL] reformatting floats ?

Gauthier, Dave <dave.gauthier@intel.com> schrieb:

>
>
> Hi:
>
> if...
> create table coords (id int, x float, y float);
> then...
> insert into coords (id,x,y) values (1,1.000,2.001)
> and then...
>             select * from coords
> i get...
>             1,1,2.001
> i want...
>             1.1.000,2.001
> while retaining the numeric nature of the x,y data (for math ops in other
> operations).
>
> How can I reformat the float output (sort of like using %5.3f in good-ole C)

CAST it to numeric ;-)

test=# create table coords (id int, x float, y float);
CREATE TABLE
Time: 4.437 ms
test=*# insert into coords (id,x,y) values (1,1.000,2.001);
INSERT 0 1
Time: 4.831 ms
test=*# select id, x::numeric(10,3), y::numeric(10,3) from coords;
 id |   x   |   y
----+-------+-------
  1 | 1.000 | 2.001


Andreas
--
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