| (: |
| XQuery Aggregate Query |
| ---------------------- |
| Find the annual precipitation (PRCP) for a Syracuse, NY using the airport |
| weather station (USW00014771) report for 1999. |
| :) |
| fn:sum( |
| let $collection := "../../../../../../../weather_data/dataset-tiny-local/data_links/local_speed_up/d0_p1_i0/sensors/?select=*.xml;recurse=yes" |
| for $r in collection($collection)/root/dataCollection/data |
| where $r/station eq "GHCND:USW00014771" |
| and $r/dataType eq "PRCP" |
| and fn:year-from-dateTime(xs:dateTime(fn:data($r/date))) eq 1999 |
| return $r/value |
| ) div 10 |
