SQL、LINQ、Lambda 三种用法

使用工具：LINQPad4

1.准备数据表  

Customer（顾客表）-- Id（自增主键）Name（顾客姓名）Phone（顾客联系方式）

CREATE TABLE [dbo].[Customer](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    [Name] [nvarchar](50) NULL,
    [Phone] [nvarchar](16) NULL,
 CONSTRAINT [PK_Customer] PRIMARY KEY CLUSTERED
(
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

顾客表建库脚本

Order（订单表）-- Id（自增主键）OrderName（订单名称）Content（订单内容）CustomerId（顾客id）

CREATE TABLE [dbo].[Order](
    [Id] [int] IDENTITY(1,1) NOT NULL,
    [OrderName] [nvarchar](50) NULL,
    [Content] [nvarchar](256) NULL,
    [CustomerId] [int] NOT NULL,
 CONSTRAINT [PK_Order] PRIMARY KEY CLUSTERED
(
    [Id] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]

GO

ALTER TABLE [dbo].[Order]  WITH CHECK ADD  CONSTRAINT [FK_CustomerOrder] FOREIGN KEY([CustomerId])
REFERENCES [dbo].[Customer] ([Id])
GO

ALTER TABLE [dbo].[Order] CHECK CONSTRAINT [FK_CustomerOrder]

订单表建库脚本

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