SQLServer 2008中SQL增强之一：Values新用途

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
*/

注意该语句的最后一行定义了“源”名称和列名,其中列名用于select语句。

本人来自 cnblogs 邀月 [e-mail]