When was the order placed whose shipment tracking number is 3452? Give me the date.
create table shipments (order_id varchar, shipment_tracking_number varchar, PRIMARY KEY (order_id)); create table orders (date_order_placed varchar, order_id varchar, PRIMARY KEY (date_order_placed))
select t1.date_order_placed from orders as t1 join shipments as t2 on t1.order_id = t2.order_id where t2.shipment_tracking_number = 3452