I am wondering what is the exact difference between these two kinds of Django filter from performance aspects.
User.objects.filter(Q(first_name='R') & ~Q(last_name='Z')
and
User.objects.filter(first_name='R').exclude(last_name='Z')
Is there any other differences except performance? Thanks in advance
答案 0 :(得分:4)
实际上根本没有区别,甚至没有区别。两者都评估为完全相同的查询;它们只是拼写同一件事的不同方式。