sql server merge 的用法

CREATE TABLE tTable
(
id INT ,
f1 VARCHAR(10) ,
f2 VARCHAR(10) ,
f3 VARCHAR(10)
)
GO
INSERT  INTO tTable
SELECT  11 ,12 , 13 , 14
INSERT  INTO tTable
SELECT  13 ,24 ,25,26

GO

CREATE TABLE tTable2
(
id INT ,
f5 VARCHAR(10) ,
f6 VARCHAR(10)
)
GO

CREATE PROC MERGETest
AS
BEGIN
MERGE INTO tTable2 T1
USING( SELECT    id ,f3 ,f2  FROM  tTable  )T2  ON ( T1.id = T2.id )
WHEN MATCHED
THEN  UPDATE SET T1.f5 = T2.f2 ,T1.f6 = T2.f3
WHEN NOT MATCHED THEN
INSERT ( id, f5, f6 )
VALUES ( t2.id, t2.f2, t2.f3 );

END
GO