UA
Size: a a a
UA
N
N
A
Z
Z
for id in Edition.objects.all().values_list('id', flat=True):
for school_id in p_models.AlmaMater.objects.all().values_list('id', flat=True):
num = NumberBooks.objects.filter(edition_id=id, school_id=school_id)
if len(num) > 1:
num[1:].delete()
DT
DT
Model.objects.values('field1', 'field2').order_by().annotate(cnt=Count('pk')).filter(cnt__gt=1)
DT
DT
DT
UA
N
UA
N
UA
UA
Z
Model.objects.values('field1', 'field2').order_by().annotate(cnt=Count('pk')).filter(cnt__gt=1)
DT
Z