How to implement data grouping operations by specific fields in Django?

In Django, to group data by specific fields, the values() or values_list() methods are used together with annotate() from the ORM.

For example, if there is an Order model with a status field and you want to count the number of orders for each status:

from django.db.models import Count

Order.objects.values('status').annotate(count=Count('id'))

This will return a QuerySet of dictionaries, where each dictionary contains the status and the count of orders with that status.

Thus, values() defines the fields for grouping, and annotate() applies aggregate functions to each group.