| (: Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| |
| http://www.apache.org/licenses/LICENSE-2.0 |
| |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. :) |
| |
| (: XQuery Aggregate Query :) |
| (: Find the annual precipitation (PRCP) for a Seattle using the airport :) |
| (: station (US000000002) for 2002. :) |
| let $collection := "ghcnd_half_1|ghcnd_half_2" |
| for $r in collection($collection)/dataCollection/data |
| where $r/station eq "GHCND:US000000002" |
| and $r/dataType eq "PRCP" |
| and fn:year-from-dateTime(xs:dateTime(fn:data($r/date))) eq 2002 |
| return $r/value |