Db indexing in django using the indexes option within your model's Meta class for more complex or multi-column indexes

db_indexing.py

class Order(models.Model):
    customer_email = models.EmailField()
    order_date = models.DateTimeField(auto_now_add=True)

    class Meta:
        indexes = [
            models.Index(fields=['customer_email', 'order_date']), # Composite index
        ]