SQL Server 2008对T-SQL语言的增强(1)

CREATE TABLE #a
(
    Column1 nvarchar(max),
    Column2 nvarchar(max)
);
GO
INSERT INTO #a
VALUES (
('1', '1'),
('2', '2')
);
SELECT * FROM #a;
GO
DROP TABLE #a;
GO

[ WITH  [ ,...n ] ]
INSERT 
    [ TOP ( expression ) [ PERCENT ] ] 
    [ INTO ] 
    { 

USE tempdb;
GO
DROP TABLE t;
GO
CREATE TABLE t(i int UNIQUE, j int, vc varchar(100));
CREATE INDEX t_vc ON t(vc);
GO
DECLARE @p1 int, @p2 int, @p3 int, @p4 int, @p5 int;
SELECT * FROM t WHERE i IN (@p1, @p2, @p3, @p4, @p5);
GO
DECLARE @p1 int, @p2 int, @p3 int, @p4 int, @p5 int;
SELECT * FROM t WITH (FORCESEEK) WHERE i IN (@p1, @p2, @p3, @p4, @p5);
GO
SELECT * FROM t WHERE vc LIKE 'Test%';
GO
SELECT * FROM t WITH (FORCESEEK) WHERE vc LIKE 'Test%';
GO
DECLARE @vc varchar(100);
SELECT * FROM t WHERE vc LIKE @vc;
GO
DECLARE @vc varchar(100);
SELECT * FROM t WITH (FORCESEEK) where vc like @vc;
GO