October 4th, 2012, 02:24 PM
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Registered User
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Join Date: Aug 2012
Posts: 6
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How to call this CTE for multiple data?
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? Thanks.
Code:
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 sample output is like this (the hours represent an hourly interval 22:00 means time between 22:00:00 and 22:59:59 etc.)
Code:
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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