The inventory table contains one row for
each copy of a given film in a given store.
The inventory table refers to the
film
and
store
tables using foreign keys and is referred to by the
rental
table.
inventory_id: A surrogate primary key
used to uniquely identify each item in inventory.
film_id: A foreign key pointing to the
film this item represents.
store_id: A foreign key pointing to the
store stocking this item.
last_update: The time that the row was
created or most recently updated.
