class Q [source] A Q() object, like an

class Avg(expression, output_field=FloatField(), **extra) [source] Returns the mean value

class Sum(expression, output_field=None, **extra) [source] Computes the sum of all values

select_related(*fields) Returns a QuerySet that will “follow” foreign-key relationships, selecting additional related-object

class Variance(expression, sample=False, **extra) [source] Returns the variance of the data

bulk_create(objs, batch_size=None) This method inserts the provided list of objects into the database in an efficient manner

order_by(*fields) By default, results returned by a QuerySet are ordered by the ordering tuple given by the ordering

update_or_create(defaults=None, **kwargs) A convenience method for updating an object with the given kwargs, creating

earliest(field_name=None) Works otherwise like latest() except the direction is changed.

first() Returns the first object matched by the queryset, or None if there is no matching object. If the QuerySet