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 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 products (product_id NUMBER, product_name CLOB, product_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 orders (order_id NUMBER, customer_id NUMBER, order_status CLOB, date_order_placed TIME, order_details CLOB)

Give me a list of distinct product ids from orders placed between 1975-01-01 and 1976-01-01?
SELECT DISTINCT T2.product_id FROM orders AS T1 JOIN order_items AS T2 ON T1.order_id = T2.order_id WHERE T1.date_order_placed >= "1975-01-01" AND T1.date_order_placed <= "1976-01-01"
SELECT DISTINCT "T2"."product_id" FROM "orders" "T1" JOIN "order_items" "T2" ON "T1"."order_id" = "T2"."order_id" WHERE "1975-01-01" <= "T1"."date_order_placed" AND "1976-01-01" >= "T1"."date_order_placed"