day63作业

import os

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "about_ORM.settings")
import django

django.setup()

from app01 import models
from django.db.models import *
# 1 .查找所有书名里包含金老板的书

# ret1 = models.Book.objects.filter(title__contains="金老板")
# print(ret1)
"""
select * from app01_book where title regexp "金老板";
"""

# 2.查找出版日期是2018年的书

# ret2 = models.Book.objects.filter(publish_date__year=2018)
# print(ret2)


"""
select * from app01_book where year(publish_date)=2018;
"""

# 3.查找出版日期是2017年的书名

# ret3 = models.Book.objects.filter(publish_date__year=2017)
# for i in ret3:
#     print(i.title)

"""
select title from app01_book where year(publish_date)=2017;
"""
# 4.查找价格大于10元的书

# ret4 = models.Book.objects.filter(price__gt=10)
# print(ret4)

"""
select * from app01_book where price>10;
"""

# 5.查找价格大于10元的书名和价格

# ret5 = models.Book.objects.filter(price__gt=10)
# for i in ret5:
#     print(i.title,i.price)


"""
select title,price from app01_book where price>10;
"""
# 6.查找memo字段是空的书

# ret6 = models.Book.objects.filter(memo__isnull=True)
# print(ret6)


"""
select * from app01_book where memo is Null;

"""
# 7.查找在北京的出版社

# ret7 = models.Publisher.objects.filter(city="北京")
# print(ret7)

"""
select * from app01_publisher where city = "北京";
"""
# 8.查找名字以沙河开头的出版社

# ret8 = models.Publisher.objects.filter(name__startswith="沙河")
# print(ret8)

"""
select * from app01_publisher where name like "沙河%";
"""

# 9.查找“沙河出版社”出版的所有书籍

# ret = models.Publisher.objects.filter(name="沙河出版社")
# ret9 = []
# for i in ret:
#     ret9.extend(models.Book.objects.filter(publisher=i.pk))
# print(ret9)

"""
select * from app01_book where publisher_id in (select app01_publisher.id from app01_publisher where name = "沙河出版社");
"""

# 10.查找每个出版社出版价格最高的书籍价格

# ret = models.Book.objects.values("publisher").annotate(max=Max("price"))
# for i in ret:
#     print(i["publisher"],i["max"])


"""
select app01_publisher.name,max(price) from app01_book inner join app01_publisher  on app01_book.publisher_id = app01_publisher.id group by publisher_id;
"""

# 11.查找每个出版社的名字以及出的书籍数量
# 分组重做
# ret = models.Publisher.objects.annotate(count=Count("book__pk"))
# for i in ret:
#     print(i.name,i.count)

"""
select app01_publisher.name,count(*) from app01_book inner join app01_publisher  on app01_book.publisher_id = app01_publisher.id group by publisher_id;
"""
# 12.查找作者名字里面带“小”字的作者
# ret12 = models.Author.objects.filter(name__contains="小")
# print(ret12)
"""
select * from app01_author where name regexp "小";
"""

# 13.查找年龄大于30岁的作者
# ret13 = models.Author.objects.filter(age__gt=30)
# print(ret13)
"""
select * from app01_author where age>30;
"""
# 14.查找手机号是155开头的作者
# ret14 = models.Author.objects.filter(phone__startswith="155")
# print(ret14)
"""
select * from app01_author where phone like "155%";
"""
# 15.查找手机号是155开头的作者的姓名和年龄
# ret14 = models.Author.objects.filter(phone__startswith="155")
# for i in ret14:
#     print(i.name,i.age)


"""
select name,age from app01_author where phone like "155%";
"""
# 16.查找每个作者写的价格最高的书籍价格
# author_list = models.Author.objects.all()
# for i in author_list:
#     book = i.book_set.all().order_by("price").last()
#     print(i.name,book.price)

# 分组

# ret = models.Author.objects.annotate(max=Max("book__price"))
# for i in ret:
#     print(i.name,i.max)


"""
select a01a.name,max(price) from app01_book inner join app01_book_author a01ba on app01_book.id = a01ba.book_id inner join app01_author a01a on a01ba.author_id = a01a.id group by a01a.id;
"""
# 17.查找每个作者的姓名以及出的书籍数量
# author_list = models.Author.objects.all()
# for i in author_list:
#     book_count = i.book_set.all().count()
#     print(i.name,book_count)

# 分组

# a = models.Author.objects.annotate(count=Count("book__pk"))
# for i in a:
#     print(i.name,i.count)


"""
select a01a.name,count(*) from app01_book inner join app01_book_author a01ba on app01_book.id = a01ba.book_id inner join app01_author a01a on a01ba.author_id = a01a.id group by a01a.id;
"""
# 18.查找书名是“跟金老板学开车”的书的出版社
# book = models.Book.objects.filter(title="跟金老板学开车")[0]
# publisher = models.Publisher.objects.filter(pk=book.publisher.pk)
# print(publisher)
"""
select * from app01_book inner join app01_publisher a01p on app01_book.publisher_id = a01p.id where title="跟金老板学开车";
"""
# 19.查找书名是“跟金老板学开车”的书的出版社所在的城市
# book = models.Book.objects.filter(title="跟金老板学开车")[0]
# publisher = models.Publisher.objects.filter(pk=book.publisher.pk)
# print(publisher[0].city)
"""
select a01p.city from app01_book inner join app01_publisher a01p on app01_book.publisher_id = a01p.id where title="跟金老板学开车";
"""
# 20.查找书名是“跟金老板学开车”的书的出版社的名称
# book = models.Book.objects.filter(title="跟金老板学开车")[0]
# publisher = models.Publisher.objects.filter(pk=book.publisher.pk)
# print(publisher[0].name)
"""
select a01p.name from app01_book inner join app01_publisher a01p on app01_book.publisher_id = a01p.id where title="跟金老板学开车";

"""
# 21.查找书名是“跟金老板学开车”的书的出版社出版的其他书籍的名字和价格
#book = models.Book.objects.filter(title="跟金老板学开车")[0]
# orther_books = models.Book.objects.filter(publisher=book.publisher.pk)
# for i in orther_books:
#     print(i.title,i.price)
"""
select title,price from app01_book where publisher_id =( select a01p.id from app01_book inner join app01_publisher a01p on app01_book.publisher_id = a01p.id where title="跟金老板学开车");
"""
# 22.查找书名是“跟金老板学开车”的书的所有作者
# book = models.Book.objects.filter(title="跟金老板学开车")[0]
# for  i in book.author.all():
#     print(i.name)
"""
select a01a.name from app01_book inner join app01_book_author a01ba on app01_book.id = a01ba.book_id inner join app01_author a01a on a01ba.author_id = a01a.id where title= "跟金老板学开车";
"""
# 23.查找书名是“跟金老板学开车”的书的作者的年龄
# book = models.Book.objects.filter(title="跟金老板学开车")[0]
# for  i in book.author.all():
#     print(i.age)
"""
select a01a.age from app01_book inner join app01_book_author a01ba on app01_book.id = a01ba.book_id inner join app01_author a01a on a01ba.author_id = a01a.id where title= "跟金老板学开车";
"""
# 24.查找书名是“跟金老板学开车”的书的作者的手机号码
# book = models.Book.objects.filter(title="跟金老板学开车")[0]
# for  i in book.author.all():
#     print(i.phone)
"""
select a01a.phone from app01_book inner join app01_book_author a01ba on app01_book.id = a01ba.book_id inner join app01_author a01a on a01ba.author_id = a01a.id where title= "跟金老板学开车";
"""
# 25.查找书名是“跟金老板学开车”的书的作者们的姓名以及出版的所有书籍名称和价钱
# book = models.Book.objects.filter(title="跟金老板学开车")[0]
# for i in book.author.all():
#     for j in i.book_set.all():
#         print(i.name,j.title,j.price)

"""
select a01a.name,title,price from app01_book inner join app01_book_author a01ba on app01_book.id = a01ba.book_id inner join app01_author a01a on a01ba.author_id = a01a.id where a01a.id in (
select a01a.id from app01_book inner join app01_book_author a01ba on app01_book.id = a01ba.book_id inner join app01_author a01a on a01ba.author_id = a01a.id where title= "跟金老板学开车");
"""