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15. How to group records in Django ORM?

Grouping of records in Django ORM can be done using aggregation functions like Max, Min, Avg, Sum. Django queries help to create, retrieve, update and delete objects. But sometimes we need to get aggregated values from the objects. We can get them by example shown below

>>> from django.db.models import Avg, Max, Min, Sum, Count
>>> User.objects.all().aggregate(Avg('id'))
{'id__avg': 7.571428571428571}
>>> User.objects.all().aggregate(Max('id'))
{'id__max': 15}
>>> User.objects.all().aggregate(Min('id'))
{'id__min': 1}
>>> User.objects.all().aggregate(Sum('id'))
{'id__sum': 106}
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