SQL: Update from a Select

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

//生成表1
CREATE TABLE [dbo].[Table_1](
[id] [int] IDENTITY(1,1) NOT NULL,
[name] [nchar](10) NULL
) ON [Data Filegroup 1]

//插入两条记录到表1
INSERT [dbo].[Table_1] (name) VALUES('hello')
INSERT [dbo].[Table_1] (name) VALUES('world')
GO



//生成表2
CREATE TABLE [dbo].[Table_2](
[id] [int] IDENTITY(1,1) NOT NULL,
[name] [nchar](10) NULL
) ON [Data Filegroup 1]

//插入两条记录到表2
INSERT [dbo].[Table_2] (name) VALUES('tom')
INSERT [dbo].[Table_2] (name) VALUES('jack')
GO

//将表2中id相同的name同步到表1中.
UPDATE [dbo].[Table_1]
SET [dbo].[Table_1].name = [dbo].[Table_2].name

FROM [dbo].[Table_2]
WHERE [dbo].[Table_1].id = [dbo].[Table_2].id

GO