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Help with sub query 2+ messages / 2 participants [nested] [flat]
* Help with sub query @ 2007-03-19 02:56 roopa perumalraja <roopabenzer@yahoo.com> 0 siblings, 1 reply; 2+ messages in thread From: roopa perumalraja @ 2007-03-19 02:56 UTC (permalink / raw) To: pgsql-sql Hi all, I want the last value from the group of rows. The table 'index_prices' is index_code price_time price XYZ 09:45:00 7.5 XYZ 09:46:00 7.4 XYZ 09:59:00 7.2 XYZ 10:00:00 7.3 XYZ 10:01:00 7.6 XYZ 10:02:00 7.3 . . . The other table 'times' is for time interval snapshot_time 10:00:00 10:30:00 11:00:00 I want the last value of the price between the interval of time. So I do select tm.index_code, tm.price_date, t.snapshot_time, last(tm.price) from index_prices_200703 tm, times t where tm.index_code = 'XYZ' and tm.price_time >= (t.snapshot_time - '30 minute' :: interval)::time and tm.price_time < t.snapshot_time group by t.snapshot_time, tm.price_date, tm.index_code order by tm.index_code, tm.price_date, t.snapshot_time; The last() doesn't work. Can this be done using sub query? Thanks in advance --------------------------------- Food fight? Enjoy some healthy debate in the Yahoo! Answers Food & Drink Q&A. ^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Help with sub query @ 2007-03-19 04:03 Phillip Smith <phillip.smith@weatherbeeta.com.au> parent: roopa perumalraja <roopabenzer@yahoo.com> 0 siblings, 0 replies; 2+ messages in thread From: Phillip Smith @ 2007-03-19 04:03 UTC (permalink / raw) To: 'roopa perumalraja' <roopabenzer@yahoo.com>; pgsql-sql Add something like this to your query: ORDER BY price_time LIMIT 1 Cheers, ~p -----Original Message----- From: pgsql-sql-owner@postgresql.org [mailto:pgsql-sql-owner@postgresql.org] On Behalf Of roopa perumalraja Sent: Monday, 19 March 2007 13:56 To: pgsql-sql@postgresql.org Subject: [SQL] Help with sub query Hi all, I want the last value from the group of rows. The table 'index_prices' is index_code price_time price XYZ 09:45:00 7.5 XYZ 09:46:00 7.4 XYZ 09:59:00 7.2 XYZ 10:00:00 7.3 XYZ 10:01:00 7.6 XYZ 10:02:00 7.3 . . . The other table 'times' is for time interval snapshot_time 10:00:00 10:30:00 11:00:00 I want the last value of the price between the interval of time. So I do select tm.index_code, tm.price_date, t.snapshot_time, last(tm.price) from index_prices_200703 tm, times t where tm.index_code = 'XYZ' and tm.price_time >= (t.snapshot_time - '30 minute' :: interval)::time and tm.price_time < t.snapshot_time group by t.snapshot_time, tm.price_date, tm.index_code order by tm.index_code, tm.price_date, t.snapshot_time; The last() doesn't work. Can this be done using sub query? Thanks in advance _____ Food <http://answers.yahoo.com/dir/index;_ylc=X3oDMTFvbGNhMGE3BF9TAzM5NjU0NTEwOAR fcwMzOTY1NDUxMDMEc2VjA21haWxfdGFnbGluZQRzbGsDbWFpbF90YWcx?link=ask&sid=39654 5367> fight? Enjoy some healthy debate in the Yahoo! <http://answers.yahoo.com/dir/index;_ylc=X3oDMTFvbGNhMGE3BF9TAzM5NjU0NTEwOAR fcwMzOTY1NDUxMDMEc2VjA21haWxfdGFnbGluZQRzbGsDbWFpbF90YWcx?link=ask&sid=39654 5367> Answers Food & Drink Q&A. *******************Confidentiality and Privilege Notice******************* The material contained in this message is privileged and confidential to the addressee. If you are not the addressee indicated in this message or responsible for delivery of the message to such person, you may not copy or deliver this message to anyone, and you should destroy it and kindly notify the sender by reply email. Information in this message that does not relate to the official business of Weatherbeeta must be treated as neither given nor endorsed by Weatherbeeta. Weatherbeeta, its employees, contractors or associates shall not be liable for direct, indirect or consequential loss arising from transmission of this message or any attachments ^ permalink raw reply [nested|flat] 2+ messages in thread
end of thread, other threads:[~2007-03-19 04:03 UTC | newest] Thread overview: 2+ messages (download: mbox mbox.gz follow: Atom feed) -- links below jump to the message on this page -- 2007-03-19 02:56 Help with sub query roopa perumalraja <roopabenzer@yahoo.com> 2007-03-19 04:03 ` Phillip Smith <phillip.smith@weatherbeeta.com.au>
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