CREATE TABLE products (product_id NUMBER, product_name CLOB, product_details CLOB)
CREATE TABLE customers (customer_id NUMBER, customer_name CLOB, customer_details CLOB)
CREATE TABLE orders (order_id NUMBER, customer_id NUMBER, order_status CLOB, date_order_placed TIME, order_details CLOB)
CREATE TABLE shipment_items (shipment_id NUMBER, order_item_id NUMBER)
CREATE TABLE order_items (order_item_id NUMBER, product_id NUMBER, order_id NUMBER, order_item_status CLOB, order_item_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)

On which day was the order placed whose shipment tracking number is 3452?
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
SELECT "T1"."date_order_placed" FROM "orders" "T1" JOIN "shipments" "T2" ON "T1"."order_id" = "T2"."order_id" AND "T2"."shipment_tracking_number" = 3452