| (: XQuery Join Query :) | |
| (: Find the all the records for TMIN. :) | |
| count( | |
| let $sensor_collection_min := "/tmp/1.0_partition_ghcnd_all_xml/sensors" | |
| for $r_min in collection($sensor_collection_min)/dataCollection/data | |
| where $r_min/dataType eq "TMIN" | |
| return $r_min | |
| ) |