将django语法和sql对应一下，希望对大家有所帮助
查询单个列的值
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story.object.values_list("url", flat=true)
select `story`.`url` from `hbtc_story` where `story`.`status` = resolved
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and查询
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stories.objects.filter(q(status='resolved') & q(status='developing'))
select * from `story` where (`story`.`status` = resolved and `story`.`status` = developing)
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或查询
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stories.objects.filter(q(status='resolved') | q(status='developing'))
select * from `story` where (`story`.`status` = resolved or `story`.`status` = developing)
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not查询
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stories.objects.filter(~q(status='resolved'))
select * from `story` where not (`story`.`status` = resolved)
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查询为空
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stories.objects.filter(status__isnull=true)
select * from `story` where `story`.`plan_id_id` is null
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like查询
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stories.objects.filter(status__contains='resolved')
select * from `story` where `story`.`status` like binary %resolved%;
stories.objects.filter(status__endswith='resolved')
select * from `story` where `story`.`status` like binary %resolved;
stories.objects.filter(status__istartswith='resolved')
select * from `story` where `story`.`status` like binary resolved%;
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in查询
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stories.objects.filter(status__in=('resolved',))
select * from `story` where `story`.`status` in (resolved) ;
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distinct查询
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story.object.values_list("status", flat=true).distinct()
select distinct `story`.`status` from `story`
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具体示例代码
django查询sql语句
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# 1 res=models.book.objects.all()
# print(res)#<queryset [<book: book object>, <book: book object>, <book: book object>, <book: book object>, <book: book object>, <book: book object>]>
#2 res=models.book.objects.filter(price='555')
# print(res)#<queryset [<book: 海贼王>, <book: 哆啦a梦>]>
#3 res=models.book.objects.get(nid=2)
# print(res.price)#三月的狮子
# res=models.book.objects.get(nid=10)
# print(res)#只能用于一个对象的里面
#4 res=models.book.objects.exclude(price='555')
# print(res)#<queryset [<book: 百变小樱>, <book: 三月的狮子>, <book: 水星领航员>, <book: 火影忍者>]>
#5 res=models.book.objects.values('title','publishdate')
# print(res)#<queryset [{'title': '百变小樱', 'publishdate': datetime.date(2000, 8, 8)}, {'title': '三月的狮子', 'publishdate': datetime.date(2017, 10, 19)}, {'title': '水星领航员', 'publishdate': datetime.date(2004, 2, 23)}, {'title': '火影忍者', 'publishdate': datetime.date(1996, 1, 2)}, {'title': '海贼王', 'publishdate': datetime.date(1995, 2, 2)}, {'title': '哆啦a梦', 'publishdate': datetime.date(1969, 12, 31)}]>
#6 res=models.book.objects.values_list('title','price')
# print(res)#<queryset [('百变小樱', decimal('155.00')), ('三月的狮子', decimal('114.00')), ('水星领航员', decimal('999.99')), ('火影忍者', decimal('99.20')), ('海贼王', decimal('555.00')), ('哆啦a梦', decimal('555.00'))]>
#7 res=models.book.objects.filter(price='555').distinct()
# print(res)
#8 res=models.book.objects.count()
# print(res) 6
#9 res=models.book.objects.first()
# print(res)#百变小樱
#10 res=models.book.objects.exists()
# print(res)#true
####################################################
#1 res=models.book.objects.filter(price__gt=200 )
# print(res)#<queryset [<book: 水星领航员>, <book: 海贼王>, <book: 哆啦a梦>]>
#
#2 res=models.book.objects.filter(price__lte=555,price__gte=114)
# print(res)#<queryset [<book: 百变小樱>, <book: 三月的狮子>, <book: 海贼王>, <book: 哆啦a梦>]>
#3 res=models.book.objects.filter(publishdate__year=2017)
# print(res)#<queryset [<book: 三月的狮子>]>
#4 res=models.book.objects.filter(title__startswith='水')
# print(res)#<queryset [<book: 水星领航员>]>
#5 res=models.book.objects.filter(title__contains='小')
# print(res)#<queryset [<book: 百变小樱>]>
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://www.cnblogs.com/ldq1996/p/7737827.html