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yurukov/query.sql

Created February 23, 2016 20:10
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Get the 24 h average level for PM10 in Sofia air quality data
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query.sql
SELECT a.timest,a.level, a.isinvalid, (select round(avg(a1.level)) from air_sofia a1 where a1.station=a.station and a1.param=0 and a1.isinvalid=0 and a1.timest>=a.timest - interval 12 hour and a1.timest<a.timest + interval 12 hour) level24,(select count(a2.level) from air_sofia a2 where a2.station=a.station and a2.param=0 and a2.isinvalid=0 and a2.timest>=a.timest - interval 12 hour and a2.timest<a.timest + interval 12 hour) validcount FROM air_sofia a where param=0 and station=1
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