| (: 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 Join Query :) |
| (: Count all the weather sensor readings on 1976-07-04. :) |
| count( |
| let $sensor_collection := "../../../../../../../weather_data/dataset-tiny-local/data_links/local_speed_up/d0_p1_i0/sensors/?select=*.xml;recurse=yes" |
| for $r in collection($sensor_collection)/root/dataCollection/data |
| |
| let $date := xs:date(fn:substring(xs:string(fn:data($r/date)), 0, 11)) |
| where $date eq xs:date("1976-07-04") |
| return $r |
| ) |