I have two simple tables "items" and "orders". For the sake of simplicity lets assume that one item can only be in one order or one order can only contain one item.
Now as this can be implemented using simple …
I have two tables: 'movies' and 'users'.
There's an n:m relationship between those, describing what movies a user has seen. This is described with a table 'seen'
Now i want to find out for a given user, all the …