SqlServer如何給自增列賦值（SET IDENTITY_INSERT ON）

如果想給自增列賦值，需先將自增關閉，插入完數據后再打開 

set Identity_insert [tb1] on
GO
INSERT INTO [dbo].[tb1]([ID],[Name],[ClassName])
VALUES
(4,'zhangsan','一班')
GO
set Identity_insert [tb1] off