Microsoft
Software
Hardware
Network
Question : sql column that represents a unique tag number
We have a table with a column that represents a unique tag number [INumber]. We created a CREATE UNIQUE NONCLUSTERED INDEX on it and we want to add a contraint that will take the identify column as its default value. How can we do this?
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[ATable]
') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[ATable]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE TABLE [dbo].[ATable](
[ID] [int] IDENTITY(1,1) NOT NULL,
[IName] [nvarchar](500) NOT NULL,
[INumber] [nvarchar](50) NOT NULL,
CONSTRAINT [PK_ATable] PRIMARY KEY CLUSTERED
(
[ID] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, FILLFACTOR = 90) ON [PRIMARY]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[ATable] WITH NOCHECK ADD
CONSTRAINT [DF_ATable_IName] DEFAULT ('') FOR [IName]
GO
CREATE UNIQUE NONCLUSTERED INDEX [UIX_ATable_INumber] ON [dbo].[ATable]([INumber]) ON [PRIMARY]
GO
Answer : sql column that represents a unique tag number
You could use a TRIGGER for INSERT that updated this field to value of ID if it is NULL.
Random Solutions
Cisco 7206 not recognizing OC3 card
Why does my HP Desktop have power options for being plugged in and not plugged in?
Convert image to 8bit transparent png in dot net
How do you access a ssh-secured SMB share from a Windows 7 client?
rewrite rule
BES 5.0.1 and Exchange 2010
Iphone Can't get Exchange mail on LAN but ok on 3G.
Read a Paradox database with a tool
Cannot renew IP address on WinXP
vSphere - Hard Disk Size will not go above 256G