CODE EXAMPLE FOR PYTHON

Return monthly sales value in Django

from django.db.models import Sum, F, FloatField
from django.db.models.functions import ExtractMonth

output = (
    Order.objects
    .annotate(
        month=ExtractMonth("created")
    )
    .values("month")
    .annotate(
        count=Sum("products__quantity"),
        total=Sum(
            F("products__quantity") * F("products__product__price"),
            output_field=FloatField()
        )
    )
    .order_by("month")
)