Sqlite, three tables, one is join, how do i get non-existant entries? : This seems to be the hardest thing to search for - I can find a lot of "how do i find empties in two tables", or how to do so for non-sqlite, but...

 - Three tables, item, user and item_user join
 - Three users, Bob, Jane, Danny
 - Two items, hammer, nail

How do i find the users who haven't made an order for an item?

ie
 
 - bob has ordered a hammer and a nail
 - so has Jane
 - Danny has only ordered a hammer

Can i do a search to show this? In sqlite?

