| (: XQuery Join Query :) | |
| (: Find all the weather readings for Washington state for a specific day :) | |
| (: 2002-2-2. :) | |
| let $sensor_collection := "ghcnd" | |
| for $r in collection($sensor_collection)/dataCollection/data | |
| where xs:dateTime(fn:data($r/date)) eq xs:dateTime("2002-02-02T00:00:00.000") | |
| return $r |