Обсуждение: Show CAS, USD first; the left ordered by currency name
Good morning, I have a currency table (code, description). Example values: ADF | Andorran Franc ... ... ANG | NL Antillian Guilder AON | Angolan New Kwanza AUD | Australian DollarAWG | Aruban Florin BBD | Barbados Dollar USD | US Dollar CAD | Canadian Dollar Is there a way I can query to display USD AND CAD first, while other rows are ordered by Code. For example, CAS | Canadian Dollar USD | US Dollar ADF | Andorran Franc ... Thanks a lot! -- Lu Ying
Emi Lu <emilu@encs.concordia.ca> wrote: > Good morning, > > I have a currency table (code, description). > > Example values: > ADF | Andorran Franc > ... ... > ANG | NL Antillian Guilder > AON | Angolan New Kwanza > AUD | Australian Dollar > AWG | Aruban Florin > BBD | Barbados Dollar > USD | US Dollar > CAD | Canadian Dollar > > Is there a way I can query to display USD AND CAD first, while other > rows are ordered by Code. > > For example, > > CAS | Canadian Dollar > USD | US Dollar > ADF | Andorran Franc > ... > Sure: test=*# select * from currency order by case when code='USD' then 0 when code = 'CAD' then 1 end, code;code | description ------+----------------------USD | US DollarCAD | Canadian DollarADF | Andorran FrancANG | NL Antillian GuilderAON |Angolan New KwanzaAUD | Australian DollarAWG | Aruban FlorinBBD | Barbados Dollar 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." (unknown) Kaufbach, Saxony, Germany, Europe. N 51.05082°, E 13.56889°
...order by currency not in('USD', 'AND', 'CAD');
this condition will be avaluated as FALSE for USD, AND and CAD, and as TRUE for all other currencies. When the records are sorted the "false" are placed on the top because false<true;.
this condition will be avaluated as FALSE for USD, AND and CAD, and as TRUE for all other currencies. When the records are sorted the "false" are placed on the top because false<true;.
On Thu, Jul 30, 2009 at 10:51 PM, Emi Lu <emilu@encs.concordia.ca> wrote:
Good morning,
I have a currency table (code, description).
Example values:
ADF | Andorran Franc
... ...
ANG | NL Antillian Guilder
AON | Angolan New Kwanza
AUD | Australian Dollar
AWG | Aruban Florin
BBD | Barbados Dollar
USD | US Dollar
CAD | Canadian Dollar
Is there a way I can query to display USD AND CAD first, while other rows are ordered by Code.
For example,
CAS | Canadian Dollar
USD | US Dollar
ADF | Andorran Franc
...
Thanks a lot!
--
Lu Ying
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In article <4A71F9CB.9050805@encs.concordia.ca>, Emi Lu <emilu@encs.concordia.ca> writes: > Good morning, > I have a currency table (code, description). > Example values: > ADF | Andorran Franc > ... ... > ANG | NL Antillian Guilder > AON | Angolan New Kwanza > AUD | Australian Dollar > AWG | Aruban Florin > BBD | Barbados Dollar > USD | US Dollar > CAD | Canadian Dollar > Is there a way I can query to display USD AND CAD first, while other > rows are ordered by Code. > For example, > CAS | Canadian Dollar > USD | US Dollar > ADF | Andorran Franc > ... Probably the shortest solution is SELECT code, description FROM currency ORDER BY code != 'CAD', code != 'USD', code; BTW: your data are obsolete. Andorra has the Euro.
Alternatively,
...
ORDER BY (case when code in ('USD','CAD') then 0 else 1 end),code
On Fri, Jul 31, 2009 at 4:37 AM, Harald Fuchs<hari.fuchs@gmail.com> wrote:
> In article <4A71F9CB.9050805@encs.concordia.ca>,
> Emi Lu <emilu@encs.concordia.ca> writes:
>
>> Good morning,
>> I have a currency table (code, description).
>
>> Example values:
>> ADF | Andorran Franc
>> ... ...
>> ANG | NL Antillian Guilder
>> AON | Angolan New Kwanza
>> AUD | Australian Dollar
>> AWG | Aruban Florin
>> BBD | Barbados Dollar
>> USD | US Dollar
>> CAD | Canadian Dollar
>
>> Is there a way I can query to display USD AND CAD first, while other
>> rows are ordered by Code.
>
>> For example,
>
>> CAS | Canadian Dollar
>> USD | US Dollar
>> ADF | Andorran Franc
>> ...
>
> Probably the shortest solution is
>
> SELECT code, description
> FROM currency
> ORDER BY code != 'CAD', code != 'USD', code;
>
> BTW: your data are obsolete. Andorra has the Euro.
>
>
> --
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> To make changes to your subscription:
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"order by code not in ('USD', 'EUR', 'CAD') , code" is exactly what I
was looking for!
Good to know how "order by not in" works and thank you very much for all
your inputs!
--
Lu Ying
> ...order by currency not in('USD', 'AND', 'CAD');
>
> this condition will be avaluated as FALSE for USD, AND and CAD, and as
> TRUE for all other currencies. When the records are sorted the "false"
> are placed on the top because false<true;.
>
> On Thu, Jul 30, 2009 at 10:51 PM, Emi Lu <emilu@encs.concordia.ca
> <mailto:emilu@encs.concordia.ca>> wrote:
>
> Good morning,
>
> I have a currency table (code, description).
>
> Example values:
> ADF | Andorran Franc
> ... ...
> ANG | NL Antillian Guilder
> AON | Angolan New Kwanza
> AUD | Australian Dollar
> AWG | Aruban Florin
> BBD | Barbados Dollar
> USD | US Dollar
> CAD | Canadian Dollar
>
> Is there a way I can query to display USD AND CAD first, while other
> rows are ordered by Code.
>
> For example,
>
> CAS | Canadian Dollar
> USD | US Dollar
> ADF | Andorran Franc
> ...
>
>
> Thanks a lot!
> --
> Lu Ying
>
>
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org
> <mailto:pgsql-sql@postgresql.org>)
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> http://www.postgresql.org/mailpref/pgsql-sql
>
>