CREATE TABLE orders (order_id NUMBER, customer_id NUMBER, order_status CLOB, date_order_placed TIME, order_details CLOB)
CREATE TABLE shipments (shipment_id NUMBER, order_id NUMBER, invoice_number NUMBER, shipment_tracking_number CLOB, shipment_date TIME, other_shipment_details CLOB)
CREATE TABLE invoices (invoice_number NUMBER, invoice_date TIME, invoice_details CLOB)
CREATE TABLE customers (customer_id NUMBER, customer_name CLOB, customer_details CLOB)
CREATE TABLE order_items (order_item_id NUMBER, product_id NUMBER, order_id NUMBER, order_item_status CLOB, order_item_details CLOB)
CREATE TABLE shipment_items (shipment_id NUMBER, order_item_id NUMBER)
CREATE TABLE products (product_id NUMBER, product_name CLOB, product_details CLOB)

What is the id of the most recent order?
SELECT order_id FROM orders ORDER BY date_order_placed DESC LIMIT 1
SELECT "order_id" FROM "orders" ORDER BY "date_order_placed" DESC FETCH FIRST 1 ROWS ONLY