SQL Server 2008中SQL增强之一：Values新用途

时间：2010-10-12 来源：邀月

SQL Server 2008中新增功能：可以使用单个Insert命令插入多行。

Create table Demo_Values
(PKID int not null identity(1,1) primary key
,DName Nvarchar(20) null
,DCode NVarchar(30) null
,DDate datetime null
)
go

--this SQL is only for SQL Server 2008
Insert into Demo_Values
(DName,DCode,DDate)
values
('DemoA','AAA',GETDATE()),
('DemoB','BBB',GETDATE()),
('DemoC','CCC',GETDATE()),
('DemoD','DDD',GETDATE()),
('DemoE','EEE',GETDATE())

--(5 row(s) affected)

除了可以一次性插入多行，values还有更巧妙的用法，不使用永久表或临时表而表示一个结果集，而且不需要函数或表变量。看下面的例子：　

--this SQL is only for SQL Server 2008
select DName,DCode,DDate
from
(values
('DemoA','AAA',GETDATE()),
('DemoB','BBB',GETDATE()),
('DemoC','CCC',GETDATE()),
('DemoD','DDD',GETDATE()),
('DemoE','EEE',GETDATE())
)
Demo_Values (DName,DCode,DDate)
--(5 row(s) affected)

/*
DName    DCode    DDate
DemoA    AAA    2010-10-12 20:37:45.500
DemoB    BBB    2010-10-12 20:37:45.500
DemoC    CCC    2010-10-12 20:37:45.500
DemoD    DDD    2010-10-12 20:37:45.500
DemoE    EEE    2010-10-12 20:37:45.500
*/