ylb： SQL表的高级查询-子查询

ylbtech-SQL Server: SQL Server- SQL表的高级查询-子查询

 SQL Server 表的高级查询-子查询。

1，ylb：表的高级查询-子查询返回顶部

--================================

-- ylb:表的高级查询-子查询

--    pubs库的练习

-- 12/12/2011

--================================

use pubs

go

select * from authors

select * from titleauthor

select * from titles

select * from publishers

select * from stores

go

--1. 查找和出版商同一州的作者姓名。

select * from authors a

where state in(select state from publishers where state=a.state)

go

select * from authors a

where exists(select * from publishers where state=a.state)

go

--2. 查找和商店同一州的作者姓名

select * from authors a

where state in(select state from stores where state=a.state)

go

--3. 查找和商店同一城市的出版社名称

select * from publishers p

where city in (select city from stores where city=p.city)

go

--4. 查找写商业书的作者名

select * from authors

select * from titleauthor

select * from titles

go

--4_1,

select title_id from titles

where type='business'

go

--4_2,

select au_id from titleauthor

where title_id in('BU1032','BU1111','BU2075','BU7832')

go

--4_3,

select * from authors

where au_id in('213-46-8915','267-41-2394')

go

--4,结论

select * from authors

where au_id in(select au_id from titleauthor

where title_id in(select title_id from titles

where type='business'))

go

--5. 查找美国出版社出版的所有书

select * from publishers

select * from titles

go

--5_1,

select pub_id from publishers

where country='USA'

go

--5_2,

select * from titles

where pub_id in('0877','0736')

go

--5结论

select * from titles

where pub_id in(select pub_id from publishers

where country='USA')

go

--6. 查找美国出版社出版书的作者姓名

--6_1,

select pub_id from publishers

where country='USA'

go

--6_2,

select title_id from titles

where pub_id in('0877','0736')

go

--6_3,

select au_id from titleauthor

where title_id in('BU2075','MC2222')

go

--6_4,

select * from authors

where au_id in('213-46-8915','712-45-1867')

go

--6总结

select * from authors

where au_id in(select au_id from titleauthor

where title_id in(select title_id from titles

where pub_id in(select pub_id from publishers

where country='USA')))

go

--7. 查找在CA州出版社所出版的商业书作者姓名

--7-1,

select pub_id from publishers

where state='CA'

go

--7-2,

select title_id from  titles

where pub_id in('1389')

and [type]='business'

go

--7-3,

select au_id from titleauthor

where title_id in('BU1032','BU1111')

go

--7-4,

select * from authors

where au_id in('213-46-8915','409-56-7008')

go

--7总结

select * from authors

where au_id in(select au_id from titleauthor

where title_id in(select title_id from  titles

where pub_id in(select pub_id from publishers

where state='CA')

and [type]='business'))

go

--P:8. 查找和出版社在同一州的作者所写的书名

--8_1,

select au_id from authors a

where state in(select state from publishers where state=a.state)

go

--8-2,

select title_id from titleauthor

where au_id in(select au_id from authors a

where state in(select state from publishers where state=a.state))

go

--8-3,

select * from titles

where title_id in(select title_id from titleauthor)

go



--8 结论

select * from titles

where title_id in(select title_id from titleauthor

where au_id in(select au_id from authors a

where state in(select state from publishers where state=a.state)))

go

--9. 查找和作者在同一城市的出版社名称

select * from publishers p

where city in(select city from authors where city=p.city)

go

--10. 查找单价大于所有商业书的书，它的作者姓名



--方法一、

--10-1,

select MAX(price) from titles where type='business'

go

--10-2a,

select title_id from titles

where price >(select MAX(price) from titles where type='business')

go

--10-2b,

select title_id from titles

where price > all(select price from titles where type='business')

go

--10-3,

select au_id from titleauthor

where title_id in(select title_id from titles

where price >(select MAX(price) from titles where type='business'))

go

--10总结

select * from authors

where au_id in(select au_id from titleauthor

where title_id in(select title_id from titles

where price >(select MAX(price) from titles where type='business')))

go



--11.   查找（Algodata Infosystems）出版社所在州，出过商业书的作者姓名

--11_1,

select pub_id from publishers

where pub_name='Algodata Infosystems'

go

--11-2,

select title_id from titles

where type='business' and pub_id =(select pub_id from publishers

where pub_name='Algodata Infosystems')

go

--11-3,

select au_id from titleauthor

where title_id in(select title_id from titles

where pub_id =(select pub_id from publishers

where pub_name='Algodata Infosystems'))

go

--11-4,

select * from authors

where au_id in(select au_id from titleauthor

where title_id in(select title_id from titles

where type='business' and pub_id =(select pub_id from publishers

where pub_name='Algodata Infosystems')))

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