问题
I'm having trouble transferring my query to django. In sqlite3 it looked like this:
SELECT A, MIN(B), MAX(B) from table GROUP BY A
This would output unique values from A with a range of values from B Any hints on how to approach this? Is it even possible in django?
回答1:
You can use values() for the GROUP BY, and annotate() for the MIN and MAX:
from django.db.models import Min, Max
MyModel.objects.values('A').annotate(min_b=Min('B'), max_b=Max('B'))
You'll get a list of dictionaries, containing the keys A, min_b and max_b.
来源：https://stackoverflow.com/questions/32561631/django-query-model-group-by-min-max