ASP.NET EF 使用LinqPad 快速学习Linq

使用LinqPad这个工具可以很快学习并掌握linq[Language Integrated Query]

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ASP.NET EF 使用LinqPad 快速学习Linq

先在数据库创建一个数据库MyFirstEF 和CustomerInfo和OrderInfo两张表

create database MyFirstEF
on primary
(
    name='MyFirstEF.mdf',
    --修改为自己电脑上SQL DB路径
    filename='E:\ProgramMSSQLServerDB\MyFirstEF.mdf',
    size=5mb,
    maxsize=100mb,
    filegrowth=10%
)
log on
(
    name='MyFirstEF_log.ldf',
    --修改为自己电脑上SQL DB路径
    filename='E:\ProgramMSSQLServerDB\MyFirstEF_log.ldf',
    size=2mb,
    maxsize=100mb,
    filegrowth=5mb
)
go

use MyFirstEF
go

create table CustomerInfo
(
    id int identity(1,1) primary key,
    customerName nvarchar(100) not null,
    customerDate datetime
)
go

create table OrderInfo
(
  id int identity(1,1) primary key,
  orderName nvarchar(100),
  customerId int
)
go


insert into CustomerInfo 
select 'aa',GETDATE() union all
select 'bb',GETDATE() union all
select 'cc',GETDATE() union all
select 'dd',GETDATE() 
go

insert into OrderInfo
select 'bike1',2 union all
select 'bike2',2 union all
select 'car1',3 union all
select 'car2',3 union all
select 'chezi1',4 union all
select 'chezi2',4 union all
select 'test1',5 union all
select 'test2',5
go

select * from CustomerInfo
go

select * from OrderInfo
go

--create SQL