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