Add this code to the WordPress wpdb::get_results method.

wp-db.php

<?php
/**
 * Add the following testing code into the `wp-includes/wp-db.php` file
 * This snippet of code will trigger our plugin's recorder.
 */

	public function get_results( $query = null, $output = OBJECT ) {
// TESTING - TONYA
if ( function_exists( 'UpTechLabs\KnowTheCode\GroupbyLab\record_database_hit' ) ) {
	\UpTechLabs\KnowTheCode\GroupbyLab\record_database_hit( $query );
}
// TESTING-END - TONYA