orders

• post > woo-add-custom-data-to-orders link > https://wisdmlabs.com/blog/add-custom-data-woocommerce-order/
• post > woocommerce-get-order-data-using-wc_order_query link > https://github.com/woocommerce/woocommerce/wiki/wc_get_orders-and-WC_Order_Query