delete.
	 * @return void
	 */
	public static function delete( $batch_size ) {
		global $wpdb;

		$order_ids = $wpdb->get_col(
			$wpdb->prepare(
				"SELECT order_id FROM {$wpdb->prefix}wc_order_stats ORDER BY order_id ASC LIMIT %d",
				$batch_size
			)
		);

		foreach ( $order_ids as $order_id ) {
			OrdersStatsDataStore::delete_order( $order_id );
		}
	}
}