Re: Date searching by month & day only
От | Chris Campbell |
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Тема | Re: Date searching by month & day only |
Дата | |
Msg-id | 453A24085F801842AEA8D0B6B269065D020B2D909A0A@HDMC.cds.local обсуждение исходный текст |
Ответ на | Re: Date searching by month & day only (Steve Crawford <scrawford@pinpointresearch.com>) |
Список | pgsql-novice |
>> 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 touse 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
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