How do you distinguish between standard queries and F-queries in Django when working with a database?

In Django, standard queries are regular ORM operations that work with specific values, for example:

# Filtering by a specific value
Entry.objects.filter(score=10)

F-queries (F expressions) allow referencing field values in the database within the query itself, which is useful for updates or filters dependent on current field values:

from django.db.models import F

# Increase the score field value by 1 for all records
Entry.objects.update(score=F('score') + 1)

# Filter records where score is greater than value
Entry.objects.filter(score__gt=F('value'))

They can be distinguished by the use of the F class from django.db.models. F-queries do not substitute specific values from Python but form SQL expressions that are executed on the database side.