I have a CTE that takes top left and bottom right latitude/longitude values
along with a start and end date and it then calculates the amount of user
requests that came from those coordinates per hourly intervals between the
given start and end date. However, I want to execute this query for about
2600 seperate 4-tuples of lat/lon corner values instead of typing them in
one-by-one. How would I do that? The code is as below:
WITH cal AS ( SELECT generate_series('2011-02-02 00:00:00'::timestamp , '2012-04-01
05:00:00'::timestamp, '1 hour'::interval) AS stamp
),
qqq AS ( SELECT date_trunc('hour', calltime) AS stamp, count(*) AS zcount FROM mytable WHERE calltime >= '2011-02-13
11:59:11' AND calltime <= '2012-02-13 22:02:21' AND (calltime::time >= '11:59:11' AND calltime::time <=
'22:02:21') AND ((extract(DOW from calltime) = 3) /*OR (extract(DOW from calltime) =
5)*/) AND lat BETWEEN '40' AND '42' AND lon BETWEEN '28' AND '30'GROUP BY date_trunc('hour', calltime)
)
SELECT cal.stamp, COALESCE (qqq.zcount, 0) AS zcount
FROM cal
LEFT JOIN qqq ON cal.stamp = qqq.stamp
WHERE cal.stamp >= '2011-02-13 11:00:00' AND cal.stamp <= '2012-02-13 22:02:21' AND ((extract(DOW from cal.stamp) =
3)/*OR (extract(DOW from cal.stamp) =
5)*/) AND ( extract ('hour' from cal.stamp) >= extract ('hour' from '2011-02-13
11:00:00'::timestamp) AND extract ('hour' from cal.stamp) <= extract ('hour' from '2012-02-13
22:02:21'::timestamp) )
ORDER BY stamp ASC;
And the sample output for the query above:
calltime zcount
"2011-02-16 11:00:00" 0
"2011-02-16 12:00:00" 70
"2011-02-16 13:00:00" 175
"2011-02-16 14:00:00" 97
"2011-02-16 15:00:00" 167
.
.
.
--
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