Fixed #10042 -- YAADT (Aggregation Docs Typo).

know the lowest and highest price of any book that is available for sale

in a store, you could use the aggregate::

    >>> Store.objects.aggregate(min_price=Min('books__price'), max_price=Min('books__price'))

    >>> Store.objects.aggregate(min_price=Min('books__price'), max_price=Max('books__price'))

Join chains can be as deep as you require. For example, to extract the

age of the youngest author of any book available for sale, you could