(: XQuery Filter Query :) | |
(: See historical data for Riverside, CA (AS000000003) station by selecting :) | |
(: the weather readings for December 25 over the last 10 years. :) | |
let $collection := "ghcnd_half_1|ghcnd_half_2" | |
for $r in collection($collection)/dataCollection/data | |
let $datetime := xs:dateTime(fn:data($r/date)) | |
where $r/station eq "GHCND:AS000000003" | |
and fn:year-from-dateTime($datetime) ge 2000 | |
and fn:month-from-dateTime($datetime) eq 3 | |
and fn:day-from-dateTime($datetime) eq 3 | |
return $r |