an SQL query from a 3 tables, can't get the results required

Question

Answer 1

This looks like a generic homework question.

I suggest you familiarize yourself with this page and site http://use-the-index-luke.com/sql/join.

Solution:

Change your statement to:

SELECT 
    items.title, items.artist, orders.order_date, orders.ship_date
FROM 
    items 
JOIN 
    orderline ON orderline.item_id = items.item_id 
JOIN 
    orders ON orders.order_id = orderline.order_id