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
I want the last value from the group of rows. The table 'index_prices' is
index_code price_time price
The other table 'times' is for time interval
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?
Food fight? Enjoy some healthy debate
in the Yahoo! Answers Food & Drink Q&A.
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