if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Table2]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[Table2]
GO
CREATE TABLE [dbo].[Table2] (
[id] [int] IDENTITY (1, 1) NOT NULL ,
[Num] [int] NULL
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[Table2] WITH NOCHECK ADD
CONSTRAINT [PK_Table2] PRIMARY KEY CLUSTERED
(
[id]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[Table2] ADD
CONSTRAINT [IX_Table2] UNIQUE NONCLUSTERED
(
[Num]
) ON [PRIMARY]
GO