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將django語法和sql對(duì)應(yīng)一下,希望對(duì)大家有所幫助
查詢單個(gè)列的值
story.object.values_list("url", flat=True) SELECT `story`.`url` FROM `hbtc_story` WHERE `story`.`status` = resolved
AND查詢
Stories.objects.filter(Q(status='resolved') & Q(status='developing')) SELECT * FROM `story` WHERE (`story`.`status` = resolved AND `story`.`status` = developing)
或查詢
Stories.objects.filter(Q(status='resolved') | Q(status='developing')) SELECT * FROM `story` WHERE (`story`.`status` = resolved OR `story`.`status` = developing)
NOT查詢
Stories.objects.filter(~Q(status='resolved')) SELECT * FROM `story` WHERE NOT (`story`.`status` = resolved)
查詢?yōu)榭?br />
Stories.objects.filter(status__isnull=True) SELECT * FROM `story` WHERE `story`.`plan_id_id` IS NULL
like查詢
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%;
in查詢
Stories.objects.filter(status__in=('resolved',)) SELECT * FROM `story` WHERE `story`.`status` IN (resolved) ;
distinct查詢
story.object.values_list("status", flat=True).distinct() SELECT DISTINCT `story`.`status` FROM `story`
具體示例代碼
Django查詢SQL語句
# 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: 海賊王>, <Book: 哆啦A夢>]> #3 res=models.Book.objects.get(nid=2) # print(res.price)#三月的獅子 # res=models.Book.objects.get(nid=10) # print(res)#只能用于一個(gè)對(duì)象的里面 #4 res=models.Book.objects.exclude(price='555') # print(res)#<QuerySet [<Book: 百變小櫻>, <Book: 三月的獅子>, <Book: 水星領(lǐng)航員>, <Book: 火影忍者>]> #5 res=models.Book.objects.values('title','publishDate') # print(res)#<QuerySet [{'title': '百變小櫻', 'publishDate': datetime.date(2000, 8, 8)}, {'title': '三月的獅子', 'publishDate': datetime.date(2017, 10, 19)}, {'title': '水星領(lǐng)航員', 'publishDate': datetime.date(2004, 2, 23)}, {'title': '火影忍者', 'publishDate': datetime.date(1996, 1, 2)}, {'title': '海賊王', 'publishDate': datetime.date(1995, 2, 2)}, {'title': '哆啦A夢', 'publishDate': datetime.date(1969, 12, 31)}]> #6 res=models.Book.objects.values_list('title','price') # print(res)#<QuerySet [('百變小櫻', Decimal('155.00')), ('三月的獅子', Decimal('114.00')), ('水星領(lǐng)航員', Decimal('999.99')), ('火影忍者', Decimal('99.20')), ('海賊王', Decimal('555.00')), ('哆啦A夢', 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)#百變小櫻 #10 res=models.Book.objects.exists() # print(res)#True #################################################### #1 res=models.Book.objects.filter(price__gt=200 ) # print(res)#<QuerySet [<Book: 水星領(lǐng)航員>, <Book: 海賊王>, <Book: 哆啦A夢>]> # #2 res=models.Book.objects.filter(price__lte=555,price__gte=114) # print(res)#<QuerySet [<Book: 百變小櫻>, <Book: 三月的獅子>, <Book: 海賊王>, <Book: 哆啦A夢>]> #3 res=models.Book.objects.filter(publishDate__year=2017) # print(res)#<QuerySet [<Book: 三月的獅子>]> #4 res=models.Book.objects.filter(title__startswith='水') # print(res)#<QuerySet [<Book: 水星領(lǐng)航員>]> #5 res=models.Book.objects.filter(title__contains='小') # print(res)#<QuerySet [<Book: 百變小櫻>]>
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