黑马程序员_第十一篇：sql中join，子查询，row_number

---------------------- Windows Phone 7手机开发、.Net培训、期待与您交流！ ----------------------

join表连接

select o.billno,c.name,c.age from T_orders as o join T_customers as c on o.custemerid=c.id

子查询——单值：

select 1 as f1,2,(select min(Fyearpublic) from F_book) as e1,(select max(Fyearpublic) from T_book) as e2

单行多列的查询结果

select * from T_reader where Fyearofjin in (select distinct Fyearpublic from T_book)

Row_Number() (开创函数，不能放到where后，但可利用子查询)

select * from (

select Row_number() over (order by Fsalary desc) as rownumber ,Fnumber,Fname,Fsalary,Fage from T_employee) as e1

where e1.rownumber>=3 and e1.rownumber<=5

---------------------- Windows Phone 7手机开发、.Net培训、期待与您交流！ ----------------------