Re: Date searching by month & day only

Поиск
Список
Период
Сортировка
Искать
От
Chris Campbell
Тема
Re: Date searching by month & day only
Дата
Msg-id
453A24085F801842AEA8D0B6B269065D020B2D909A0A@HDMC.cds.local
Ответ на
Список
Дерево обсуждения
Date searching by month & day only Chris Campbell <ccampbell@cascadeds.com>
Re: Date searching by month & day only Steve Crawford <scrawford@pinpointresearch.com>
Re: Date searching by month & day only Chris Campbell <ccampbell@cascadeds.com>
>> I'm attempting to pull up a birthday list of anyone born between, 
>> let's say June 15 and June 30^th . The year is irrelevant.
>>
>> I'm wondering if there is a more elegant way to do this than using 
>> something like:
>>
>> SELECT key, dob from ds1.contact
>>
>> WHERE
>>
>> extract(month FROM contact.dob ) = 6
>>
>> and extract(day FROM contact.dob) >= 15
>>
>> and extract(day FROM contact.dob) <= 30
>>
>>
>One thing to consider is whether the rest of your query combined with the size of your table will require the ability to use an >index to speed the query.

>Here is one possibility
>SELECT ... WHERE to_char(contact.dob, 'MMDD') between '0615' and '0630'...
>If necessary, you can index on (to_char(contact.dob, 'MMDD')).
>Cheers,
>Steve

I like it!  Thank you Steve for your suggestion.


--
Sent via pgsql-novice mailing list (pgsql-novice@postgresql.org) To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-novice
В списке pgsql-novice по дате отправления
От: Steve Crawford
Дата:
От: Rory Campbell-Lange
Дата:
Сообщение: Re: QUERY
FAQ