Bugfix new device-recent-data action

docs/05-API-Docs.md

@@ -14,7 +14,11 @@ Action									| Meaning
 [`device-data`](#device-data)			| Gets data by device given a start and end time.
 [`changelog`](#changelog)				| Gets the changelog as a fragment of HTML.
 
-These are explained in detail below:
+These are explained in detail below. First though, a few notes:
+
+ - All dates are in UTC.
+ - All datetime-type fields support the keyword `now`.
+
 
 ## version
 > Returns the version of the application.

logic/Repositories/MariaDBMeasurementDataRepository.php

@@ -166,13 +166,13 @@ class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
 		$s = $this->get_static;
 		return $this->database->query(
 			"SELECT
-				AVG({$s("table_name_values")}.{$s("column_values_value")}) AS {$s("column_values_value")},
-				MIN({$s("table_name_values")}.{$s("column_values_reading_id")}) AS {$s("column_values_reading_id")},
+				{$s("table_name_values")}.{$s("column_values_value")} AS {$s("column_values_value")},
+				{$s("table_name_values")}.{$s("column_values_reading_id")} AS {$s("column_values_reading_id")},
 				
-				MIN(COALESCE(
+				COALESCE(
 					{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
 					{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
-				)) AS datetime
+				) AS datetime
 			FROM {$s("table_name_values")}
 			JOIN {$s("table_name_metadata")} ON
 				{$s("table_name_metadata")}.{$s("column_metadata_id")} = {$s("table_name_values")}.{$s("column_values_reading_id")}
@@ -182,7 +182,7 @@ class MariaDBMeasurementDataRepository implements IMeasurementDataRepository {
 			ORDER BY COALESCE(
 				{$s("table_name_metadata")}.{$s("column_metadata_recordedon")},
 				{$s("table_name_metadata")}.{$s("column_metadata_storedon")}
-			)
+			) DESC
 			LIMIT :count;", [
 				"device_id" => $device_id,
 				"reading_type" => $type_id,