前言

查询的时候经常会用到比较查询，大于某个值或者小于这种。
django里面的比较查询有：
__gt 大于
__lt 小于
__gte 大于等于
__lte 小于等于

__gt 和 __lt

查询表里面年龄大于20的信息

查询sql

SELECT * from yoyo_personinfo WHERE age>20

对应的django查询

python manage.py shell
Python 3.6.0 (v3.6.0:41df79263a11, Dec 23 2016, 08:06:12) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> from yoyo.models import PersonInfo
>>> 
>>> PersonInfo.objects.filter(age__gt=20).values("id","name","age")
<QuerySet [{‘id‘: 9, ‘name‘: ‘yoyo5‘, ‘age‘: 21}]>
>>> PersonInfo.objects.filter(age__lt=20).values("id","name","age")
<QuerySet [{‘id‘: 7, ‘name‘: ‘yoyo3‘, ‘age‘: 11}, 
{‘id‘: 10, ‘name‘: ‘22‘, ‘age‘: 11}, 
{‘id‘: 11, ‘name‘: ‘bbbbbbbbccccccccc‘, ‘age‘: 11}]>
>>>

__gt 是大于，__lt是小于

__gte 和 __lte

SQL 查询表里面年龄大于等于 20 的信息

SELECT * from yoyo_personinfo WHERE age>=20

对应的django查询

MyDjango>python manage.py shell

>>> from yoyo.models import PersonInfo
>>>
>>> PersonInfo.objects.filter(age__gte=20).values("id","name","age")
<QuerySet [{‘id‘: 6, ‘name‘: ‘yoyo2‘, ‘age‘: 20}, 
{‘id‘: 8, ‘name‘: ‘yoyo4‘, ‘age‘: 20}, 
{‘id‘: 9, ‘name‘: ‘yoyo5‘, ‘age‘: 21}]>
>>> PersonInfo.objects.filter(age__lte=20).values("id","name","age")
<QuerySet [{‘id‘: 6, ‘name‘: ‘yoyo2‘, ‘age‘: 20}, 
{‘id‘: 7, ‘name‘: ‘yoyo3‘, ‘age‘: 11}, 
{‘id‘: 8, ‘name‘: ‘yoyo4‘, ‘age‘: 20}, 
{‘id‘: 10, ‘name‘: ‘22‘, ‘age‘: 11},
{‘id‘: 11, ‘name‘: ‘bbbbbbbbccccccccc‘, ‘age‘: 11}]>
>>>

__gte 是大于等于，__lt是小于等于

python测试开发django-80.ORM查询之比较查询(__gt, __lt)

原文：https://www.cnblogs.com/yoyoketang/p/13218295.html